The PROX Steel Valve Kit offers top-quality components made from nitrided steel that is micro-hardened to reduce friction and wear. These steel valves are more durable than the original valves and provide an optimal replacement for short-lived titanium valves. The kit includes a specially weight-matched set of chrome-vanadium steel valve springs, designed to withstand extremely high RPMs. Best of all, this kit can be installed without modifying the original parts, making it a perfect upgrade for enhancing engine longevity and performance.