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The Cobb catback is the exhaust we recommend for any GD WRX/STI build — the 3-inch mandrel-bent stainless steel construction supports power levels well beyond Stage 2 and the sound character is aggressive without being obnoxious on the street
Slots will wipe the surface contact between the pad and the rotor to improve the bite
only order if willing to wait
Stiffness vs Stock: 130%
Remark Axle Back Exhaust Muffler Delete Stainless Single Wall Tips - 2015-2024 Subaru WRX / 2015-2021 STI PDM_rods The Cobb catback is theUpgrade your 2015 21 WRX STi with the Remark Muffler Axleback Exhaust. With a 3. 5in single wall tip, this bolt on system reduces backpressure and adds a deeper, more aggressive exhaust note. Eliminate mufflers for improved performance and the iconic boxer rumble. Works with OEM midpipe or our 3" midpipe. *This product does not work with OEM Factory SPT Midpipe. * This product are not interchangeable with Sports Touring Catback Exhaust.
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