ProX Racing Parts 28.SIS1336-2 Steel Intake Valve and Spring Kit
ProX steel valve and spring kits offer increased durability and less wear under extreme conditions, easily lasting 3 times longer than the OEM titanium valves. Nitrided valves offer high microhardness while supersmooth surface finish reduces friction between stem and guide. Spring are made from premium chrome vanadium steel for higher performance and durability under high RPM. These stronger …