The PROX Steel Valve Kit offers top-quality components made from nitrided steel and micro-hardened to minimize friction and wear. These valves ensure longer durability compared to original valves, making them an ideal replacement for short-lived titanium valves. The kit includes a specially weight-optimized set of steel valve springs made from chrome-vanadium, designed for extra high RPM resistance. Easy to install without modifications to the original parts, this steel valve kit provides excellent performance and reliability for your KAWASAKI or SUZUKI motorcycles.