Description
If you’re pushing your engine to the limit, OEM valve springs will eventually let you down—they simply aren’t engineered for sustained high-RPM loads. The PROX Intake Valve and Spring Kit 28.SIS3338-2 replaces those weak links with nitrided steel valves and premium chrome vanadium springs, giving you the durability and reliability needed for extreme track conditions. This is a straightforward upgrade that bolts in using your existing hardware, delivering measurable gains in valve stability and longevity without fabrication headaches.
- Nitrided steel valves
- Increased durability rating
- Premium chrome vanadium springs
- High-RPM rated construction
- OEM retainer compatible
- OEM base compatible
- OEM seal compatible
- Bolt-on installation
- MPN: 28.SIS3338-2
