4200 RPM Purple Stinger Spring for Extreme High-RPM Builds

Radical revs require radical parts— the Purple Spring engages at 4200 RPM, perfect for overbored or piped engines.

• Purple marking for high-end specialist identification.
• Extra tension handles intense vibrational stresses.

In unrestricted classes, it maximizes airflow and rev potential, delaying drag until the perfect moment. Feel the surge as power finally connects, propelling you past rivals.

For those engineering edge-of-limit karts, this is the tune that tips scales.