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Agency Power does it again with their catback system for the WRX/STI. This system features full 3" stainless steel polished piping that exits through their fully titanium race muffler. It is completely TIG welded for added strength and durability. Agency Power has seen a 12whp gain typically with this catback and it will bolt up to a stock downpipe or aftermarket downpipe with no issue. Included is all hardware and gaskets for installation.
The catback exhaust will fit to the factory downpipe or aftermarket downpipes/headers. The exhaust has an angled exit as seen in the pictures for that JDM look. The race sound of the exhaust will not drone inside the car but give you that quality tone you desire.
Note: Are you using a stock j pipe or downpipe? If yes, the GrimmSpeed Subaru Stock DP to Aftermarket 3 in. Catback Adapter p/n 077046, is required.Agency Power 5 Speed Short Shifter Subaru WRX 2008-2014 (AP-GH-300)
Agency Power Up Pipe Subaru WRX 2002-2014 / STI 2004-2019 (AP-GDA-173)
Agency Power Shifter Bushings for 03-06 EVO 8 + 9 (AP-CT9A-305)
Agency Power High Flow Fuel Rail Mitsubishi EVO 8 (AP-CT9A-120R)
Agency Power Stainless Steel Header Mitsubishi EVO X (AP-CZ4A-175)
Agency Power Cat Back Exhaust Nissan 370Z 2008-2015 (AP-Z34-170)
Agency Power Rear Axle Back Exhaust w/ Ti Tips 2007-2010 BMW 135I (AP-135I-170)
Agency Power Mid Pipe 2009-2015 Nissan GTR (AP-GTR-173)
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