High-Flow 28.5mm Stainless Steel Exhaust Valve with 5.5mm Stem

Why settle for stock when you can upgrade to superior exhaust management? This 28.5mm stainless steel valve, featuring a 5.5mm stem, is crafted to expel gases more efficiently, clearing the cylinder for fresher charges and amplifying power delivery.

Built to endure the rigors of kart track battles, its stainless construction resists fatigue, ensuring longevity even in high-heat scenarios. The design promotes enhanced volumetric efficiency, which means your engine can rev higher and pull stronger through gears.

• 5.5mm stem diameter for stable operation under valve spring pressure.
• Requires aftermarket locks and retainers to secure against extreme forces.
• Direct OEM part SI-R-4 equivalent for hassle-free installation in clone heads.

Racers report tangible gains in mid-range torque, making overtakes easier and corner exits punchier. This valve isn't just a replacement—it's a strategic enhancement for anyone chasing podium finishes. By optimizing exhaust flow, it indirectly boosts fuel economy during practice runs too. SKU: SSV285.

Equip your GX200 with this for a setup that feels alive, responding instantly to your inputs on the track.

Frequently Asked Questions

Q: Is this valve a direct replacement for my stock GX200 engine?

A: Yes, this 28.5mm valve is a direct OEM equivalent (SI-R-4) for clone heads, making it a straightforward upgrade for your GX200 engine.

Q: Do I need to change my valve springs or retainers when installing this stainless steel valve?

A: Yes. Because this valve is designed for high-performance applications, you must use aftermarket locks and retainers to ensure the valve is properly secured against the increased forces of high-RPM racing.

Q: Will this valve improve my kart's performance?

A: Absolutely. By improving volumetric efficiency and exhaust flow, this valve helps your engine rev higher and provides a noticeable boost in mid-range torque, which is ideal for better corner exits and easier overtaking.

Q: Can I use this valve with my stock valve seats?

A: While it is designed for clone heads, we always recommend checking your valve seat condition during installation. If your seats are worn, they should be re-cut or replaced to ensure a perfect seal for maximum compression.

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