This is a full 3″ 304 stainless steel exhaust we developed for the 08+ STi. The system starts with a modified COBB downpipe. Some of the highlights of the system include full v-band connections rather than traditional 2 or 3-bolt flanges. The v-bands allow for easy connect/disconnect of the exhaust components. In between the downpipe and mid-pipe there is a high flow metal core catalytic converter than can be swapped with a race/test pipe for trips to the track. The muffler features a centered inlet and exits into quad tips.

We tested a bone stock 08 STi on our AWD DynoJet, then installed our exhaust and tested it again. Simply installing our exhaust yielded an increase of 30whp and 2 ft. lbs. There was no tuning done to obtain these results, it was simply unbolt the stock exhaust, and install our exhaust.