Cylinder Heads & Parts

Shop Subaru cylinder heads and valvetrain components at IAG Performance for 2002–2023 Subaru WRX, STI, Legacy GT, Forester XT, and BRZ models. Our selection includes high-quality Subaru cylinder head parts designed for EJ20, EJ25, and FA20 engines, whether you're performing routine maintenance, upgrading valvetrain components, or building a high-performance Subaru engine. Browse a wide range of Subaru cylinder head upgrades and replacement parts including ported head packages, camshafts, cam sprockets, valves, valve springs, retainers, valve guides, gaskets, seals, timing chains, head hardware, and other essential valvetrain components. These parts are engineered to support everything from reliable daily driving to high-horsepower Subaru WRX and STI engine builds. IAG Performance carries cylinder head parts and valvetrain components from many of the most trusted names in the Subaru performance community. Featured brands include AEM, Brian Crower, GSC Power Division, IAG Performance, JE Pro Seal, Kelford Cams, Killer B Motorsport, Manley Performance, Subaru OEM, Turnin Concepts, and more. Whether you're refreshing your Subaru cylinder heads or building a fully upgraded EJ or FA engine, IAG Performance offers the parts and expertise to support your Subaru WRX, STI, Legacy GT, Forester XT, or BRZ build.