GSC P-D 2012+ Subaru BRZ FA20 Manganese Bronze Exhaust Valve Guide Stopper Style +.001in OD - Single (GSC3063.001-1)

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.