3049385 High volume fuel pressure relief valveThis valve will help with increased fuel flow and fuel pressure. It is a critical part to make sure your engine is performing well. On our chassis dyno we have seen increases as much as 40 hp and 80 ft lbs of torque. VALVE CHECK(1367227 ORING) Cat check valves are designed to provide a uni directional fluid flow and prevent back flow in the fuel system. Attributes: Assembly consists of valve, o ring, hex bolt and back up ring Adapter color: orange