We are proud to announce our Cat-Back exhaust for the 2008-2011 Subaru STi Hatchback/5 Door. Our goal with this project was to develop a reasonably priced, manufacturable high flowing, low-drone design when combined with our 3″ mandrel bent divorced downpipe (Due for release soon).

The result was a 3″ into dual 2.25″ axleback featuring quad double wall staggered tips, all stainless TIG welded construction that is Handbuilt to Order in America. Utilizing a straight through flowing muffler with internal perforated y-pipe and well designed dogleg y’s on each exhaust tip for a flush and tucked fit in the rear bumper valence cutouts without risking overheating or melting the valence. This design also has the benefit of perfectly even flow from the right to left as well as out of each of the four tips. No biased flow here like you may find on muffler designs that use a baffled internal resonance chamber.

The Midpipe is a free-flowing straight-through 3″ mandrel bent system that utilizes one 18″ resonator to smooth out any rasp. Our design uses a v-band connection in the rear to allow the user to fine-tune the fitment of the exhaust. The MidPipe also uses a flex coupling near the AxleBack connection flange to eliminate exhaust “wag” found in other exhausts.

The CatBack system includes all required hardware, a 3” aluminum gasket with a raised sealing ring to provide a positive seal at the AxleBack joint, and a 3” donut gasket similar to the factory gasket. We use a factory style donut gasket due to the superior sealing ability of this style of gasket.

Here are some videos on our blog: GR Hatch AxleBack Exhaust Video

Powdercoat options only include the Axleback portion of the catback system due to the extreme heat the Midpipe experiences.