Subaru Impreza WRX GH Performance Parts & Upgrades

• Subaru Impreza WRX STI (GR): the STI hatch, many parts fit both
• Subaru Impreza WRX STI (GV): the STI sedan
• Subaru Impreza WRX (GD): the model before
• Subaru WRX (VA): the 2014-on replacement
• Subaru WRX STI (VA)
• Subaru BRZ (ZC6)
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• Tuning and turbo: COBB Accessports (Australian spec), boost control and flex fuel kits, GFB blow off valves, Turbosmart wastegate actuators, and COBB and Process West intercoolers and charge pipes.
• Exhaust: KORSH turbo-back exhausts and downpipes, COBB cat-backs, and COBB and GrimmSpeed up pipes.
• Suspension: HARDRACE arms, bushes and sway bars, COBB and Perrin sway bars, COBB rear arms, and AST and MOTON coilovers.
• Engine: GSC Power-Division and Supertech valvetrain, ACL bearings, ARP studs and Radium fuel parts.
• Brakes: an Alcon rear big brake kit and a HARDRACE master cylinder stopper.

• WRX or STI: the STI has a different engine, gearbox and brakes. Body and suspension parts often fit both, but check the title for engine and driveline parts.
• Hatch or sedan: exhausts, rear aero and some springs differ by body style. AST lowering springs, for example, are listed for the hatch.
• Year and bumper: some aero parts, such as the APR front splitter, are made for 2008-2010 cars only. Check the years in the title.
• Tune needed: intake, exhaust and boost parts usually need a tune. Plan the Accessport with the parts.

Most parts here are bolt-on, but engine, turbo, suspension and brake work should be done by a qualified workshop. Get a wheel alignment after any suspension change, and bleed and road-test the brakes after brake work.