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Agency Power 3
2015+ WRX / 2015-2018 STI
Agency Power has developed one of the best sounding and performing exhaust systems for the 2011-2015 STi Sedan. The new exhaust features an all T304 stainless steel piping in 3inch diameter from the catback. The piping is all hand polished featuring robotic TIG welding.
The midpipe includes a resonator to assist in keeping that traditional boxxer engine sound with an exotic race tone touch that does not drone in the cabin. The ½ inch thick flanges offer a secure fit along with the factory placement exhaust hangers. The catback exhaust uses a high flow Y-Pipe to efficiently direct exhaust to the dual exhaust canisters. The Y-pipe features a merged collector and 3 inch piping on each extension to give your exhaust a combined 5 inches of exhaust flow. The straight through mufflers are designed to optimize horsepower with very little restriction.
The catback exhaust features quad 3.5 inch titanium tips with the Agency Power logo. As tested on a Mustang all wheel drive dyno, the Agency Power catback exhaust made an impressive 17 all wheel horsepower and 28ft/lbs of torque. The exhausts are available for 2011-2015 WRX STi Sedans.
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Agency Power 3 / GRBS-170-PARENT Fits
1 customer review
(2018 wrx)Great quality exhaust that deffinitly shoots above and beyond at the pricepoint.
Before I decided to purchase this cat-back for my 2018 wrx, i had installed some axleback muffler deletes and while I did like the sound, the cold starts where just a bit too much for me especially living in a suburban neighborhood. The crazy loud cold starts the axle backs gave where really my main reason for moving to this agency power cat-back. Ill start off with the installation of this exhaust. It went smooth as silk, Perfect fitment, Just make sure you get your hangers in the correct position before you torque down your exhaust bolts. As far as build quality, I'm amazed they are selling this at the price they are. Quality is up there with companies like invidia. Nice and thick flanges and pretty much perfect welds the whole way through. the mid pipe flange was even machined out to accept the factory doughnut gasket so no need for any adapters. As for the sound MAN oh man was this an improvement over the axleback. You get a MUCH deeper aggressive tone with little to no drone due to the resonated midpipe. Volume is much quieter on cold starts and cruising than the axle back i had previously. Once you get on the throttle though, that's when this exhaust really opens up. Great WOT sound and you dont lose any of those great pops and crackles between shifts that the muffler deletes had. In fact i think they are even more noticeable now that they dont get drowned out by the exhaust. Ive been driving with this exhaust pretty much every day on my commute to work and i couldn't be happier. I would definitely recommend this cat-back not only to someone who is looking for a lower cost alternative to other brands out there, but just for someone who wants a quality, well built exhaust in general.