Unknown Performance Exhaust adaptors help create a better seal when either using an aftermarket 3" cat back exhaust with a stock OEM Down pipe or using an Aftermarket down pipe with a stock OEM cat back exhaust.
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Compatibility
Subaru - WRX GH8 (08-09)
Subaru - WRX GRB (08 ) STi
Subaru - WRX GVB Sedan (11-14)
Subaru - WRX GVB Sedan (11-14) STi
Subaru - WRX VAB (15) STi
Subaru - WRX VAG (15) -
Compatibility
Subaru - WRX GH8 (08-09)
Subaru - WRX GRB (08 ) STi
Subaru - WRX GVB Sedan (11-14)
Subaru - WRX GVB Sedan (11-14) STi
Subaru - WRX VAB (15) STi
Subaru - WRX VAG (15)
