The PROX Steel Valve Kit is crafted with precision from nitrided steel for top-notch quality. Micro-hardened to minimize friction and wear, this kit offers significantly greater durability compared to original valves. It's an ideal replacement for short-lived titanium valves and includes a specially weight-adapted set of steel valve springs made from chrome-vanadium for exceptional high-rev endurance. Installation requires no modification of original parts, ensuring a seamless replacement process.