{"title":"Foam Air Pre-Filters 2-7\/16\"","description":"\u003cp\u003eFoam pre-filters that fit 2-7\/16 inch kart air filter assemblies. Sizes and colors vary by sleeve.\u003c\/p\u003e","products":[{"product_id":"uipf8y-foam-pre-filter-3-5-x-8-yellow-8-inch-uipf8y","title":"Yellow 8-Inch Foam Pre-Filter 3.5\" x 8\" for Kart Filter Customization","description":"\u003cp\u003eBright yellow alerts you to this versatile 3.5\" x 8\" foam pre-filter (SKU: UIPF8Y), designed for all 3.5\" filters with cut-to-fit flexibility. It wraps around AFR-177 and AFR-179 fully, or shortens for others, providing tailored defense against track elements.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEye-Catching Design:\u003c\/strong\u003e Yellow aids in quick visual checks during frantic pit stops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAdaptive Length:\u003c\/b\u003e Snip to precise size for zero waste and perfect seal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Impact Guard:\u003c\/strong\u003e Foam density catches particles that could otherwise drag speeds.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eCustomize your intake strategy with this— it keeps air pure, supporting aggressive cornering without power fade. Yellow hue organizes color-coded kits for team efficiency. Proven in endurance races, it holds form under stress, ensuring you finish strong.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I install this foam pre-filter on my kart air filter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Simply slide the foam sleeve over your existing 3.5-inch diameter air filter. Ensure it is seated evenly to provide full coverage. If your filter is shorter than 8 inches, you can trim the foam to the desired length for a custom, secure fit.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I use this pre-filter on filters other than the AFR-177 or AFR-179?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, this pre-filter is designed for versatility. While it is a perfect fit for the AFR-177 and AFR-179, its 3.5-inch diameter and cut-to-fit length make it compatible with most 3.5-inch kart air filters.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why is the bright yellow color beneficial for racing?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The high-visibility yellow color allows for rapid visual inspections during pit stops. It also helps teams organize their intake setups by color-coding different filter configurations for specific track conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How does a pre-filter help maintain engine performance?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The foam density acts as a first line of defense, catching dust, track debris, and larger particles before they reach your primary air filter. This prevents premature clogging, maintains optimal airflow, and helps avoid power fade during long endurance races.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How should I clean or maintain this foam pre-filter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Periodically remove the pre-filter and wash it with a mild detergent and water to remove accumulated dust and track grime. Ensure it is completely dry before reinstalling it on your air filter.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/afr179-3-50-x-8-2-7-16-i-d-angled-afr179\"\u003eHigh-Flow Angled Fabric Air Filter 3.50\" x 8\" 2-7\/16\" ID for Karts\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/afr177-3-50-x-6-2-7-16-i-d-angled-afr177\"\u003eAngled Fabric Air Filter 3.50\" x 6\" for 2-7\/16\" ID Kart Engines\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/uipf8bk-foam-pre-filter-3-5-x-8-black-8-inch-uipf8bk\"\u003eBlack 8-Inch Foam Pre-Filter 3.5\" x 8\" for 3.5\" Diameter Kart Filters\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/uipf8-foam-pre-filter-3-5-x-8-blue-8-inch-uipf8\"\u003eBlue 8-Inch Foam Pre-Filter 3.5\" x 8\" for AFR-177 and AFR-179\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Uni Filter","offers":[{"title":"Default Title","offer_id":52562613698878,"sku":"UIPF8Y","price":8.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/prefilterfoam-uipf8y-foam-pre-filter-3-5-x-8-yellow-8-inch-uipf8y.jpg?v=1763112835"},{"product_id":"uipf-hq-red-high-quality-foam-pre-filter-3-5-x-5-uipf-hq","title":"Uni Filter 01-1154 Red Foam Pre-Filter - 3.5\" x 5\" - All Classes","description":"\u003cp\u003eIntegrating \u003cstrong\u003enew parts\u003c\/strong\u003e into your intake system requires uncompromising filtration to prevent microscopic track dust from scoring cylinder walls. The Uni Filter 3.5\" x 5\" Red Foam Pre-Filter acts as the ultimate first line of defense for high-RPM powerplants, capturing heavy particulate matter before it ever reaches the primary element. Engineered from dense, open-cell polyurethane foam, this pre-filter wrap maximizes dirt-holding capacity without strangling volumetric efficiency. Whether you are running on a dusty dirt oval or a debris-heavy sprint track, maintaining optimal airflow is critical to preserving peak horsepower and preventing premature wear.\u003c\/p\u003e\n\n\u003ch2\u003eAdvanced Filtration for Racing Engines\u003c\/h2\u003e\n\u003cp\u003eIn the high-stakes environment of competitive karting, \u003cstrong\u003eracing engines\u003c\/strong\u003e demand pristine air to maintain stoichiometric balance. Even a minor influx of silica or track rubber can compromise piston rings and valve seats. By deploying this dense red foam pre-filter over your main intake element, you effectively double your filtration stages. The 3.5-inch by 5-inch dimensions provide a snug, compressive fit over standard pod filters, ensuring zero bypass. This wrap traps the larger, abrasive particles, allowing your primary filter to focus entirely on microscopic fines. The result is sustained throttle response and a drastic reduction in mid-race power degradation.\u003c\/p\u003e\n\n\u003ch2\u003eProtecting Carburetor Gaskets and Internals\u003c\/h2\u003e\n\u003cp\u003eAbrasive dust doesn't just hurt the cylinder; it wreaks havoc on the entire fuel delivery system. Fine grit that bypasses inadequate filters can lodge in the venturi, accelerating wear on delicate \u003cstrong\u003ecarburetor gaskets\u003c\/strong\u003e and throttle shafts. By stopping dirt at the outer boundary, this Uni Filter pre-filter ensures that your carb internals remain spotless. Furthermore, keeping the intake tract clean reduces the risk of blow-by contaminants mixing with your oil, which ultimately protects your \u003cstrong\u003eengine gaskets\u003c\/strong\u003e and bottom-end bearings from abrasive sludge.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications \u0026amp; Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen-Cell Polyurethane Foam:\u003c\/strong\u003e Maximizes dirt-trapping efficiency while maintaining high CFM flow rates for zero horsepower loss.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3.5\" x 5\" Compressive Fit:\u003c\/strong\u003e Designed to stretch and conform tightly over standard cylindrical and tapered pod filters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVibrant Red Dye:\u003c\/strong\u003e Provides immediate visual feedback on dirt accumulation, taking the guesswork out of maintenance intervals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWashable \u0026amp; Reusable:\u003c\/strong\u003e Easily cleaned with standard foam filter solvents and re-oiled for multiple race weekends.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtended Primary Filter Life:\u003c\/strong\u003e Captures heavy debris first, significantly reducing the service frequency of your expensive main filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZero-Bypass Design:\u003c\/strong\u003e The elastic nature of the foam ensures a tight seal against the base, preventing unfiltered air leaks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Condition Performance:\u003c\/strong\u003e Proven effectiveness in both dry, dusty dirt tracks and rubber-marbled asphalt circuits.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eStop sacrificing engine longevity for airflow. Equip your intake with this professional-grade pre-filter and keep your powerplant running at the absolute limit. \u003cem\u003e(And if you're building a new chassis from the ground up, be sure to check out our latest \u003cstrong\u003ego kart frame for sale\u003c\/strong\u003e to complete your winning package.)\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I install the Uni Filter 3.5\" x 5\" pre-filter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Simply slide the foam pre-filter over your existing 3.5-inch diameter pod air filter. The elastic, open-cell foam is designed to stretch and provide a snug, compressive fit that seals against the base of the filter to prevent any bypass.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How often should I clean my foam pre-filter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Maintenance intervals depend on track conditions. On dusty dirt ovals, you should inspect the filter after every heat race. If the red foam appears heavily coated in debris, wash it with a dedicated foam filter cleaner, let it air dry, and re-oil it before your next session.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does this pre-filter restrict airflow to my engine?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e No. The pre-filter is engineered from high-porosity, open-cell polyurethane foam. It is designed to capture large particulate matter while maintaining high CFM flow rates, ensuring your engine receives the air it needs for peak horsepower.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I use this on any 3.5-inch air filter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, this is a universal pre-filter designed for any cylindrical or tapered pod filter with a 3.5-inch diameter. It is an excellent way to extend the life of your primary filter regardless of the engine class you are running.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/afr179-3-50-x-8-2-7-16-i-d-angled-afr179\"\u003eHigh-Flow Angled Fabric Air Filter 3.50\" x 8\" 2-7\/16\" ID for Karts\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/afr177-3-50-x-6-2-7-16-i-d-angled-afr177\"\u003eAngled Fabric Air Filter 3.50\" x 6\" for 2-7\/16\" ID Kart Engines\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/afr80-3-50-x-4-2-7-16-i-d-straight-afr80\"\u003eStraight Fabric Air Filter 3.50\" x 4\" 2-7\/16\" ID for Kart Racing\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/uipf8bk-foam-pre-filter-3-5-x-8-black-8-inch-uipf8bk\"\u003eBlack 8-Inch Foam Pre-Filter 3.5\" x 8\" for 3.5\" Diameter Kart Filters\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/uipf8-foam-pre-filter-3-5-x-8-blue-8-inch-uipf8\"\u003eBlue 8-Inch Foam Pre-Filter 3.5\" x 8\" for AFR-177 and AFR-179\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Uni Filter","offers":[{"title":"Default Title","offer_id":52562614649150,"sku":"UIPF-HQ","price":7.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/prefilterfoam-uipf-hq-red-high-quality-foam-pre-filter-3-5-x-5-uipf-hq.jpg?v=1763112854"},{"product_id":"uipf454-foam-pre-filter-4-5-x-5-uipf454","title":"Uni Filter AFR-83\/AFR-84 Foam Pre-Filter - 4.5\" x 5\" - Universal Karting","description":"\u003ch2\u003eMaximizing Airflow for Engine and Components\u003c\/h2\u003e\n\u003cp\u003ePreventing surface loading on your primary intake element is critical for sustained horsepower, which is why professional racers evaluating go karts for sale always prioritize the Uni Filter 4.5\" x 5\" Foam Pre-Filter (MPN: UIPF454). Designed specifically to slide over AFR-83 and AFR-84 main filters, this open-cell polyurethane foam sleeve catches heavy debris, rubber marbles, and dust before they can pack into your primary element. By preventing surface loading on the main filter, this pre-filter ensures your engine maintains optimal volumetric efficiency and sustained horsepower from the green flag to the final lap. In competitive karting, maintaining a consistent air-fuel ratio is paramount, and this pre-filter guarantees your intake remains unrestricted even in the dirtiest drafting battles.\u003c\/p\u003e\n\u003ch2\u003eSeamless Integration with Your Setup\u003c\/h2\u003e\n\u003cp\u003eKarting requires meticulous attention to detail, from your parts tire selection to the exact mounting angle of your chain guards. The UIPF454 integrates flawlessly into your intake tract without disrupting airflow dynamics or causing clearance issues with surrounding hardware. Its precise 4.5\" x 5\" dimensions provide a snug, gap-free fit over the primary filter, completely eliminating bypass leaks that could introduce catastrophic particulate matter into the combustion chamber. During intense practice sessions or multi-heat race days, the ability to quickly pull, rinse, and re-oil this pre-filter means less downtime in the pits and more time perfecting your braking zones. You can focus entirely on your racing lines knowing your powerplant is heavily shielded.\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications \u0026amp; Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTargeted Compatibility:\u003c\/strong\u003e Precision-engineered to hug AFR-83 and AFR-84 main filters without gaps, slipping, or sagging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen-Cell Polyurethane:\u003c\/strong\u003e Advanced foam structure traps maximum dirt while maintaining high CFM airflow for peak performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRapid Pit Maintenance:\u003c\/strong\u003e Easily removable for quick mid-day cleaning, drastically preserving the main filter's lifespan.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDefensive Shielding:\u003c\/strong\u003e Deflects larger track debris, tire rubber, and dirt clods effectively before they reach the pleated element.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCost-Effective Protection:\u003c\/strong\u003e A highly affordable and reusable safeguard for your expensive engine and components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal Track Application:\u003c\/strong\u003e Performs flawlessly across all environments, from smooth asphalt sprint tracks to dusty dirt ovals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWashable and Reusable:\u003c\/strong\u003e Designed to withstand repeated cycles of heavy-duty foam filter cleaner and sticky filter oiling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eDon't let a clogged intake choke your top-end speed or compromise your engine's internal bearings. By utilizing a dedicated two-stage filtration approach with this pre-filter, you maintain the precise tuning required for podium finishes. This simple yet highly effective foam sleeve is an absolute necessity for any serious racer's trailer, ensuring your motor breathes clean, unrestricted air all weekend long.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Which air filters is this pre-filter designed to fit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The UIPF454 is precision-engineered to fit the Uni Filter AFR-83 and AFR-84 main air filters. Its 4.5\" x 5\" dimensions ensure a snug, gap-free fit for these specific models.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why should I use a pre-filter instead of just the main air filter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e A pre-filter acts as a first line of defense, catching large debris, rubber marbles, and dust. This prevents \"surface loading\" on your primary filter, which keeps your engine's airflow consistent and maintains peak horsepower throughout the entire race day.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I clean and maintain the foam pre-filter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This pre-filter is washable and reusable. Simply remove it from the main filter, clean it with a dedicated foam filter cleaner, let it dry, and re-oil it with high-quality foam filter oil before reinstalling.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Will this pre-filter restrict my engine's airflow?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e No. The open-cell polyurethane foam structure is designed to trap particulate matter while maintaining high CFM airflow, ensuring your engine breathes freely even in dusty or dirty track conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I use this on both dirt and asphalt tracks?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. This pre-filter is highly versatile and performs effectively in all karting environments, from high-grip asphalt sprint tracks to dusty dirt ovals.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/afr84-4-50-x-5-2-7-16-i-d-straight-afr84\"\u003eExtended Straight Fabric Air Filter 4.50\" x 5\" 2-7\/16\" ID Kart\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/afr83-4-50-x-4-2-7-16-i-d-straight-afr83\"\u003eUni Filter AFR83 Straight Fabric Air Filter - 4.50\" x 4\" (2-7\/16\" ID) - Universal Karting\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Uni Filter","offers":[{"title":"Default Title","offer_id":52562616910142,"sku":"UIPF454","price":7.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/prefilterfoam-uipf454-foam-pre-filter-4-5-x-5-uipf454.jpg?v=1763112903"},{"product_id":"uipf8-foam-pre-filter-3-5-x-8-blue-8-inch-uipf8","title":"Blue 8-Inch Foam Pre-Filter 3.5\" x 8\" for AFR-177 and AFR-179","description":"\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustom Cuttable:\u003c\/strong\u003e Trim the 3.5\" x 8\" blue foam pre-filter (SKU: UIPF8) to match AFR-175 or AFR-80 needs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePrimary Pairing:\u003c\/b\u003e Snaps onto AFR-177 and AFR-179 for full-length coverage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor-Coded Ease:\u003c\/strong\u003e Blue stands out for quick pit identification.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eAdaptability shines here—tailor it on-site to fit your exact filter stack, ensuring no air leaks that could sap power. This pre-filter's length handles high-volume intakes, keeping debris at bay for cleaner burns and sharper turns.\u003c\/p\u003e\u003cp\u003eVersatile for different race formats, it organizes your spares kit efficiently. Users love how it extends main filter intervals, freeing time for tweaks. In variable weather, its foam holds up, maintaining flow for reliable laps.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I use this pre-filter on air filters other than the AFR-177 or AFR-179?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. The UIPF8 is designed to be custom cuttable. You can trim the 3.5\" x 8\" foam to fit various filter sizes, such as the AFR-80, ensuring a snug fit that prevents air leaks and protects your engine from debris.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why should I use a foam pre-filter on my racing kart?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e A pre-filter acts as the first line of defense against track dust, dirt, and debris. By catching larger particles before they reach your main fabric air filter, it extends the service life of your primary filter and maintains consistent airflow for better engine performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I clean and maintain this foam pre-filter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The foam is durable and designed for the rigors of racing. You can typically clean it using a mild soap and water solution. Ensure it is completely dry before re-installing it over your air filter to maintain optimal engine breathing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the blue color serve a purpose other than aesthetics?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, the bright blue color is specifically chosen for quick pit identification. It allows mechanics and drivers to instantly verify that the pre-filter is in place and properly seated during high-pressure race conditions.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/afr179-3-50-x-8-2-7-16-i-d-angled-afr179\"\u003eHigh-Flow Angled Fabric Air Filter 3.50\" x 8\" 2-7\/16\" ID for Karts\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/afr177-3-50-x-6-2-7-16-i-d-angled-afr177\"\u003eAngled Fabric Air Filter 3.50\" x 6\" for 2-7\/16\" ID Kart Engines\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/afr80-3-50-x-4-2-7-16-i-d-straight-afr80\"\u003eStraight Fabric Air Filter 3.50\" x 4\" 2-7\/16\" ID for Kart Racing\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/uipf8bk-foam-pre-filter-3-5-x-8-black-8-inch-uipf8bk\"\u003eBlack 8-Inch Foam Pre-Filter 3.5\" x 8\" for 3.5\" Diameter Kart Filters\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/uipf8y-foam-pre-filter-3-5-x-8-yellow-8-inch-uipf8y\"\u003eYellow 8-Inch Foam Pre-Filter 3.5\" x 8\" for Kart Filter Customization\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Uni Filter","offers":[{"title":"Default Title","offer_id":52562617008446,"sku":"UIPF8","price":8.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/prefilterfoam-uipf8-foam-pre-filter-3-5-x-8-blue-8-inch-uipf8.jpg?v=1763112906"},{"product_id":"uipf8bk-foam-pre-filter-3-5-x-8-black-8-inch-uipf8bk","title":"Black 8-Inch Foam Pre-Filter 3.5\" x 8\" for 3.5\" Diameter Kart Filters","description":"\u003cp\u003eStealthy black finish on this 3.5\" x 8\" foam pre-filter (SKU: UIPF8BK) blends with any kart aesthetic while fitting 3.5\" diameters universally. Cut it down as needed for custom protection that doesn't hinder airflow.\u003c\/p\u003e\u003cp\u003eEssential for maintaining edge in crowded fields, it filters out the rough stuff, letting your engine focus on speed. Black color resists showing dirt, keeping your setup looking sharp at inspections.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eUniversal Sizing:\u003c\/b\u003e Works across AFR-177, AFR-179, and more with simple trimming.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRobust Foam:\u003c\/strong\u003e Absorbs shocks from rough terrain without compressing flat.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePit-Friendly:\u003c\/b\u003e Lightweight for easy transport in gear bags.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eStreamline your race prep by stocking these— they adapt to evolving setups, ensuring organized, efficient filtration every time.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I install this foam pre-filter on my kart air filter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Simply slide the foam pre-filter over your existing 3.5\" diameter air filter. The flexible foam material is designed to stretch slightly for a snug fit, ensuring no debris bypasses the filter element.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I trim this pre-filter to fit shorter air filters?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. This 8-inch pre-filter is designed to be cut to length. You can easily trim it with a sharp pair of scissors to match the specific length of your air filter, allowing for a custom, clean look.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why should I use a pre-filter instead of just the main air filter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e A pre-filter acts as the first line of defense against dust, dirt, and track debris. By catching the \"rough stuff\" before it reaches your main filter, it extends the life of your primary filter and maintains optimal airflow for consistent engine performance throughout the race day.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I clean the foam pre-filter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The foam can be cleaned by gently washing it with mild soap and water. Ensure it is completely dry before reinstalling it on your air filter to prevent moisture from entering the engine intake.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/afr179-3-50-x-8-2-7-16-i-d-angled-afr179\"\u003eHigh-Flow Angled Fabric Air Filter 3.50\" x 8\" 2-7\/16\" ID for Karts\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/afr177-3-50-x-6-2-7-16-i-d-angled-afr177\"\u003eAngled Fabric Air Filter 3.50\" x 6\" for 2-7\/16\" ID Kart Engines\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/uipf8-foam-pre-filter-3-5-x-8-blue-8-inch-uipf8\"\u003eBlue 8-Inch Foam Pre-Filter 3.5\" x 8\" for AFR-177 and AFR-179\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/uipf8y-foam-pre-filter-3-5-x-8-yellow-8-inch-uipf8y\"\u003eYellow 8-Inch Foam Pre-Filter 3.5\" x 8\" for Kart Filter Customization\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Uni Filter","offers":[{"title":"Default Title","offer_id":52562617073982,"sku":"UIPF8BK","price":8.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/prefilterfoam-uipf8bk-foam-pre-filter-3-5-x-8-black-8-inch-uipf8bk.jpg?v=1763112908"},{"product_id":"uipf110-foam-pre-filter-3-x-5-uipf110","title":"3 x 5 Inch Foam Pre-Filter for AFR-100 and AFR-110","description":"\u003cul\u003e\n\u003cli\u003eCustom fit for AFR-100 and AFR-110 bases.\u003c\/li\u003e\n\u003cli\u003eHigh-density foam captures coarse particles.\u003c\/li\u003e\n\u003cli\u003eWashable for repeated use.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eLayer this pre-filter over your primary to shield against track grit, maintaining airflow for steady acceleration. It's the unsung hero in dirty environments, keeping engines clean inside.\u003c\/p\u003e\u003cp\u003eEasy to install and remove, it organizes your filtration stack without tools. Racers in off-road karts rely on it for longevity.\u003c\/p\u003e\u003cp\u003eSKU: UIPF110\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the primary purpose of the UIPF110 foam pre-filter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This pre-filter acts as a first line of defense for your air filter. It captures coarse particles, dust, and track grit before they reach your primary filter, which helps maintain consistent airflow and extends the life of your engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this pre-filter compatible with all Uni Filter models?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e No, this specific pre-filter is custom-fit for the AFR-100 and AFR-110 filter bases. Please ensure you are using one of these compatible models for a proper fit.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I clean and maintain the foam pre-filter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The pre-filter is fully washable. Simply remove it from your primary filter, wash it with a mild detergent or specialized foam filter cleaner, rinse thoroughly, and allow it to air dry completely before reinstalling.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Do I need any tools to install this pre-filter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e No tools are required. The pre-filter is designed for easy, tool-free installation and removal, allowing you to quickly service your filtration stack at the track.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Should I oil this pre-filter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e While it can be used dry in some conditions, applying a light coat of high-quality foam air filter oil is recommended for maximum dust-trapping efficiency, especially in extremely dry or dusty off-road racing environments.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/afr110-animal-filter-3-x-5-1-25-i-d-afr110\"\u003e3 x 5 Inch Animal Air Filter with 1.25 ID Inlet\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/afr100-animal-filter-3-x-4-1-25-i-d-afr100\"\u003e3 x 4 Inch Animal Air Filter with 1.25 ID\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/afr1100-3-25-x-4-1-25-i-d-angled-afr1100\"\u003e3.25 x 4 Inch Angled Air Filter with 1.25 ID\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Uni Filter","offers":[{"title":"Default Title","offer_id":52562625003838,"sku":"UIPF110","price":8.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/airfiltersforbriggsanimal-uipf110-foam-pre-filter-3-x-5-uipf110.jpg?v=1763113099"},{"product_id":"hff-honda-foam-filter-hff","title":"Honda-Compatible Foam Pre-Filter for 2-7\/16\" Kart Filter Cups","description":"\u003cp\u003eRevive classic power with this Honda foam filter (SKU: HFF), a pre-filter that slips onto 2-7\/16\" cups for vintage two-strokes. It adds a protective layer, trapping larger particles before they hit your primary filter, which means fewer cleanings and more track time.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eClassic Fit:\u003c\/b\u003e Tailored for Honda-era engines, ensuring authentic performance restoration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSimple Protection:\u003c\/b\u003e Foam design absorbs impacts from flying debris, keeping internals spotless.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eEasy Care:\u003c\/b\u003e Wash and reinstall quickly between races.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFor enthusiasts restoring old karts, this pre-filter breathes new life into aging setups by optimizing air paths. It helps sustain the crisp throttle feel of two-strokes, aiding in quicker launches. In dusty vintage events, it proves invaluable by cutting down on contamination risks. Organize your pit tools around this durable piece—it's lightweight and packs easily. Experience the thrill of uncompromised speed without modern overkill.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Will this pre-filter fit my modern racing air filter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This pre-filter is specifically designed for 2-7\/16\" filter cups commonly found on vintage Honda-style engines. Please measure your filter cup diameter before purchasing to ensure a snug fit.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How often should I clean the foam pre-filter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e For optimal performance, especially in dusty track conditions, we recommend cleaning the foam after every race day. Simply wash it with mild soap and water, let it air dry completely, and reinstall.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does this replace my primary air filter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e No, this is a pre-filter. It is designed to slip over your existing primary filter to trap larger debris, extending the life of your main filter and keeping your engine internals cleaner.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can this be used on 212cc Clone engines?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, as long as your intake setup utilizes a 2-7\/16\" filter cup, this foam pre-filter will provide the same protective benefits for Clone engines as it does for classic Honda setups.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/jf168-9905-clone-carb-throttle-shaft-unit-jf168-9905\"\u003eGeneric Clone GX200 Complete Carb Throttle Shaft Unit - 196cc\/212cc - AKRA Legal\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/clone-viton-coated-steel-gasket-010-dj-1312\"\u003eViton Coated Steel Head Gasket .010 Inch for Honda Clones\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/jf168-1130r-clone-valve-cover-gasket-rubber-jf168-1130r\"\u003eDurable Rubber Clone Valve Cover Gasket for Reliable Sealing\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/clone-o-h-v-vent-tube-kit-cvtk\"\u003eClone OHV Vent Tube Kit for Valve Cover Breather\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/jf168-9991-clone-float-bowl-drain-nut-jf168-9991\"\u003eEasy-Access Clone Float Bowl Drain Nut\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Swift Karting","offers":[{"title":"Default Title","offer_id":52562728812862,"sku":"HFF","price":14.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/prefilterfoam-hff-honda-foam-filter-hff.jpg?v=1763114804"},{"product_id":"yellow-3-75-x-6-foam-filter","title":"Yellow 3.75 x 6 Foam Filter for Kart Engines","description":"\u003cp\u003eThis yellow foam filter measures precisely 3.75 inches by 6 inches. It serves as a direct replacement element in kart engine air intake systems.\u003c\/p\u003e\u003cp\u003eThe bright yellow color makes it easy to spot during routine maintenance and inspections.\u003c\/p\u003e\u003cp\u003eDesigned for consistent performance in 4-cycle kart applications where clean airflow is essential.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eWhat are the dimensions?\u003c\/h3\u003e\u003cp\u003eThe filter measures 3.75\" x 6\".\u003c\/p\u003e\u003ch3\u003eWhat color is this filter?\u003c\/h3\u003e\u003cp\u003eIt is yellow.\u003c\/p\u003e\u003ch3\u003eIs this an aftermarket part?\u003c\/h3\u003e\u003cp\u003eYes, this is an aftermarket foam filter.\u003c\/p\u003e","brand":"Swift Karting","offers":[{"title":"Default Title","offer_id":54336311001406,"sku":"UIPFL","price":3.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/UIPFL_Yellow_3.75__x_6__Foam_Filter.jpg?v=1787801050"},{"product_id":"yellow-closed-end-foam-filter-3-75-x-6","title":"3.75 x 6 Yellow Closed End Foam Filter for Kart Engines","description":"\u003cp\u003eThis yellow closed end foam filter measures 3.75 inches by 6 inches and is built for kart engine applications.\u003c\/p\u003e\u003cp\u003eThe closed-end construction offers a secure fit while the foam material delivers essential filtration to guard against debris.\u003c\/p\u003e\u003cp\u003eSourced as a direct replacement part, it integrates quickly into existing setups without complications.\u003c\/p\u003e\u003ch2\u003eFAQs\u003c\/h2\u003e\u003ch3\u003eWhat are the exact dimensions?\u003c\/h3\u003e\u003cp\u003e3.75 inches by 6 inches.\u003c\/p\u003e\u003ch3\u003eWhat color is this filter?\u003c\/h3\u003e\u003cp\u003eBright yellow.\u003c\/p\u003e\u003ch3\u003eDoes it have a closed end?\u003c\/h3\u003e\u003cp\u003eYes, it features a fully closed end design.\u003c\/p\u003e\u003ch3\u003eIs this suitable for kart engines?\u003c\/h3\u003e\u003cp\u003eYes, it is designed for kart racing use.\u003c\/p\u003e","brand":"Swift Karting","offers":[{"title":"Default Title","offer_id":54336344752446,"sku":"UIPFL-C","price":4.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/UIPFL-C_Yellow_Closed_End_3.75__x_6__Foam_Filter.jpg?v=1787801106"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/collections\/prefilterfoam-hff-honda-foam-filter-hff.jpg?v=1788984736","url":"https:\/\/swiftkarting.com\/collections\/foam-pre-filter-2-7-16-kart-air-filter-parts.oembed","provider":"Swift Karting","version":"1.0","type":"link"}