EXHAUST VALVE STAINLESS PSYCHIC (HEAVY DUTY SPRINGS RECOMMENDED) YAMAHA YZ450F 14-19
Performance Valves ? feature a forged one-piece construction, nitride coating, modified radius, swirl polish, chromed stems, and stellite tips. This provides reduced friction for quicker/higher revs and a longer valve life. Heavy Duty Springs Recomended
Exhaust Valve Stainless Psychic (Heavy Duty Springs Recommended) Yamaha YZ450F 14-19