Description
If you’re pushing your engine beyond stock limits, OEM valves and springs will become your bottleneck. The PROX 28.SES6353-1 Kit replaces those weak points with nitrided steel valves and premium chrome vanadium springs engineered to handle sustained high-RPM loads without failure. This is the upgrade serious builders choose when reliability at the limit matters.
Key Features:
- Nitrided steel valves
- Increased wear resistance
- Chrome vanadium springs
- High-RPM rated
- OEM-compatible installation
- Fits existing retainers
- Fits existing seals
- Complete intake or exhaust set
