The PROX Steel Valve Kit offers top-quality, nitrided steel valves that are micro-hardened to reduce friction and wear. These valves have a longer lifespan than the original ones, making them an optimal replacement for short-lived titanium valves. The kit includes specially weight-adjusted steel valve springs made from chrome-vanadium, designed for extra-high RPM endurance. Compatible with KTM and HUSQVARNA models, these parts can be installed without requiring any modifications to the original components. This kit ensures increased durability and optimal engine performance.