GSC Power Division Viton Valve Stem Seals WRX (02-14) STI (04-18) Honda OEM-quality springs that prevent the

OEM-quality springs that prevent the exhaust camshaft from slamming shut at low engine speeds and eliminate chain slack

The header has CNC machined ½ inch thick flanges and includes everything you need to bolt directly on to your turbo Subaru

but can really benefit from stiffening the chassis and reducing body roll

You can rest assure that with our superior material and design you will get optimal performance for years and decades to come

GSC Power Division Viton Valve Stem Seals WRX (02-14) STI (04-18) Honda OEM-quality springs that prevent theGSC Power Division Viton Valve Stem Seals for the WRX & STI include the entire 6mm valve size seal set (8 intake and 8 Exhaust) so you will have no guess work when it comes to installation. These stem seals are an upgrade from the standard OEM material to help cope with the higher heat caused by high performance Subaru EJ engines. Note: Full set includes 8 intake and 8 exhaust stem seals. For Subaru EJ Turbo Engines only. FITMENT: Subaru STI 2004 2014