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Shop exhaust systems for the Subaru WRX STI across the GD, GR/GV and VA generations. This aggregate covers the Impreza-based WRX STI through 2014 and the standalone WRX STI of 2015-2021, all built around the EJ-series turbocharged flat-four — the EJ257 2.5-litre in North American models from 2004 to 2021 — with body styles and exhaust routings that vary by generation. You will find cat-back and axle-back systems, downpipes, headers, mufflers here — every part in this collection is fitment-tagged for the Subaru WRX STI across the GD, GR/GV and VA generations, so check your generation, year and body style against the product fitment notes before ordering.
What exhaust systems fit my Subaru WRX STI across the GD, GR/GV and VA generations?
Every exhaust part in this collection is fitment-tagged for a WRX STI, but systems split by generation and body style across the GD, GR/GV and VA range — hatchback and sedan applications are not the same. Confirm your generation, year and body style on the product page before ordering.
What is the difference between a cat-back and an axle-back exhaust?
An axle-back replaces only the rear muffler section and mostly changes the sound. A cat-back replaces the exhaust from the catalytic converter back, changing sound and usually freeing up flow as well. Most bolt-on systems install without cutting.
Where can I find other parts for my Subaru STi?
Start with the full Subaru STi collection linked at the top of this page, or jump straight to a category — Brakes, Drivetrain, Engine, Tuning, Exterior, Intake and more are all linked above, and every one of them is scoped to the Subaru STi only.