Subaru Impreza WRX STI GC Performance Parts & Upgrades
The Subaru Impreza WRX STI (GC) was sold new in Australia from 1998 to 2000, powered by the 2.0L EJ20 turbo flat-four with all-wheel drive. Earlier Japanese Versions, the Type R coupe, Type RA and the GF wagon also reached Australia as imports. It shares its body and most suspension with the GC WRX. This page lists the parts we stock, including HARDRACE bushings and arms, GrimmSpeed and Got It Rex parts, Process West intercoolers, GSC Power-Division, Manley and ACL engine parts, DSS driveshafts and axles, and GFB and Turbosmart valves.
Shop by Vehicle
Popular upgrades for the GC STI
- Suspension: HARDRACE bushings, sway bars, camber arms, control arms, trailing arms and engine mounts, plus AST coilovers.
- Engine: GSC Power-Division and Supertech valves, guides and springs, Manley rods, King and ACL bearings, Nitto parts and ARP fasteners.
- Turbo and intake: Process West intercoolers, GFB and Turbosmart blow-off valves and wastegates, and GrimmSpeed turbo heat shields.
- Drivetrain: DSS carbon driveshafts and axle kits, and GFB short throw shifters.
- Brakes and cooling: Alcon, Brembo and Paragon big brake kits, Frenkit caliper rebuild kits, and Got It Rex radiator hoses, tanks and cooling plates.
Choosing the Right Part
- STI or WRX: most suspension parts fit both, but the STI has different brakes and an R180 rear diff on some models, so drivetrain and brake parts can differ.
- Model year: some parts are split by year, such as MY99-00 blow-off valves and inlets. Check the years in the title.
- Body style: the sedan, Type R coupe and GF wagon share most parts, but rear suspension and body parts can differ.
- Older car checks: most GC STIs are over 25 years old and many have mixed parts from previous owners. Check bushes, mounts and what is already fitted.
Installation
Have a qualified workshop fit suspension, brake, drivetrain and engine parts. Get a wheel alignment after any suspension change and bleed and road-test the brakes after brake work. Intercooler, turbo and engine upgrades need a tune to suit; ask us if you're unsure.
Need help choosing? Contact our team at sales@chicaneaustralia.com.au.
