Upgrade your motorcycle's performance with the PROX Exhaust Valve Conversion Set 28.SES6351-1, designed specifically for Husqvarna and KTM models. This innovative kit replaces the OEM titanium valves with high-quality steel valves, providing increased durability and reduced wear even under extreme conditions. The included stronger valve springs are specially engineered to handle the extra weight of the steel valves, ensuring optimal performance during high RPMs. The PROX conversion set allows for a straightforward installation using your existing OEM retainers, bases, and valve seals, eliminating the need for further engine modifications. The nitrided valve surfaces offer exceptional microhardness and a smooth finish, which significantly reduces friction between the stem and guide. This complete package is perfect for motorcycle enthusiasts looking to enhance their engine's efficiency and longevity. Features: * Steel valves for increased durability and less wear under extreme conditions * Nitrided valves offer high microhardness while supersmooth surface finish reduces friction between stem and guide * Special stronger valve springs deal with the extra weight of the steel valves * Springs are made from premium Chrome Vanadium Steel for higher performance and durability at high RPMs * Fully rebuildable with OEM retainers, bases and seals without the need of any further engine modifications * Comes as complete package for quick, easy and cost efficient replacement