Uma Racing has produced these lightweight Stelite coated stainless steel valves for racing applications. Lighten your valve train and increase maximum engine rotation speeds. This high performance products are designed from a single piece of forged stainless steel alloy. Stellite is a hard coating applied to valve stem tips and faces to provide a hard surface with high wear resistance. Sold in a pair of 25mm intake and 22mm exhaust valves for the Yamaha Jupiter MX/Crypton X/Spark/Exciter/Sniper T135, T150
These valves come included and assembled with the UMA "Super Head" performance cylinder head kit and are not needed to purchase separately.