GSC P-D SBC Manganese Bronze Int/Exh Valve Guide 2.1in L x .3415in ID x .502in OD (+.003in) - Single (GSC3071.003-1)

GSC Power-Division is a leading manufacturer of high-performance valvetrain components for turbocharged and high-performance engines. Specializing in camshafts, valve springs, and retainers, GSC products are engineered to improve power, reliability, and efficiency. Trusted by enthusiasts and professionals worldwide, GSC Power-Division delivers cutting-edge solutions for both street and motorsport applications.