This axle-back muffler delete fits the 2015-2021 Subaru WRX and STI and unlocks the sound every VA owner is chasing: the boxer rumble the factory mufflers work so hard to hide. Removing the rear mufflers gives the flat-four its voice back, with a deep burble at idle and a proper growl as revs climb.
The install is one of the easiest in the aftermarket: the section bolts on behind the rear axle, requires only basic hand tools, and leaves every emissions component untouched. It is also fully reversible if you ever want to return to stock. For WRX and STI owners who want maximum character per dollar, this is the classic first mod, and it pairs naturally with a J-pipe or cat-back later as the build grows.
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