Exhaust Valves and Springs Kit for Yamaha YFZ-R

Replace the original valves and valve springs
    Nitrided steel valves for greater durability and less wear in extreme conditions
    Stronger valve springs support the additional weight of the steel valves
    Springs are made of premium chrome-vanadium steel for better performance and durability at high rpm
    The kit contains a set of steel intake or exhaust valves and a set of specially designed valve springs; it can be installed using the original valve cups, bases, and seals