Description Brian Crower performance valves for the 08-10 Evolution X are made from premium stainless steel, fully machined and swirl polished for ultimate air flow. They feature a dished head for added weight savings and increased valve control at high rpm. Brian Crower valves for the Evolution X are available in both a standard and oversize head. Set of 8 31.5mm Exhaust Valves (1.0mm OS)
