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These factory gaskets live between the Y-pipe and rear mufflers of the 2015-2021 STI. These gaskets are a crush type so they will need to replaced if swapping or replacing the stock axle-back exhaust.
Note that these do not fit WRX models -- the WRX STI use a larger diameter gasket.
Sold as a set of two.
2.5 inch Outer Diameter
Fits:
