Subaru WRX STI (GD) Aftermarket Parts

Built to dominate rally stages and tear up mountain passes, the Subaru WRX STI (GD) is a turbocharged icon that defined a generation of performance sedans. With its aggressive stance, driver-focused DNA, and the grunt of a 2.0L or 2.5L EJ-series Boxer engine under the hood, this AWD beast was engineered for those who don’t just drive—they attack every corner.

Stock is just the starting point. At Pro Speed Racing, we’re proud to support the STI legacy by offering access to a wide range of Subaru WRX STI (GD) performance parts and aftermarket upgrades. Whether you're after tighter grip, quicker spool, or a soundtrack that turns heads, we can help you source the gear to unlock your GD's full potential.

Why Upgrade Your Subaru WRX STI (GD)?

• Boost turbo response and throttle sharpness
• Improve cornering stability with upgraded suspension
• Shed weight and gain flow with a performance exhaust
• Upgrade brake feel and stopping power
• Reinforce drivetrain for high-torque reliability
• Enhance airflow and cooling for track performance
• Lower centre of gravity for tighter handling
• Dial in that iconic rumble with exhaust tuning

Shop Subaru WRX STI (GD) Parts by Category

We’ve made it easy to find the exact parts you need. Browse by category:

• Subaru WRX STI (GD) Brakes
• Subaru WRX STI (GD) Exhausts
• Subaru WRX STI (GD) Blow Off Valves
• Subaru WRX STI (GD) Suspension & Steering

Or use our category filter below for more parts!

Find Your Perfect Subaru WRX STI (GD) Mod

Want a shortcut to finding the perfect fit? Add your vehicle to our Garage Function—it filters all the compatible performance parts just for your Subaru WRX STI (GD). No guesswork, just premium upgrades that fit right, first time.

Why Shop Subaru WRX STI (GD) Parts at Pro Speed Racing?

• Curated range built for serious STI performance builds
• Direct importer of elite brands trusted in motorsport
• Experienced team that knows the GD platform inside out
• Fast, secure delivery with real-time tracking Australia-wide
• Thousands of happy customers and 5-star reviews from the car scene

Get Ready to Mod Your Subaru WRX STI (GD)

Time to unleash what your GD was really built for. Explore our full range of Subaru WRX STI (GD) performance parts and build the STI you’ve always imagined.

Discover even more high-quality upgrades at Pro Speed Racing — your trusted source for aftermarket car parts built for performance.