The 2008+ STI TurboXS GT Series STI Exhaust was designed with three things in mind; Style, Sound and Performance.

The styling of the dual 3.5 inch tips on each side were to accentuate the rear valance on the STI. Giving it an aggressive look at the rear of the car but keeping a grown up attitude. Matching the look we designed a muffler that wouldn't take away from the Boxer sound we all love.

We were to attenuate any droaning on the highway and keep the general exhaust note down to a reasonable level. This was done by using strategically placed panels in the muffler that reflect sounds waves in a way that cancels out bad tones but to keep the exhaust gas flowing freely as possible.

TurboXS matched this muffler to 3 inch mandrel bent stainless steel piping through out to help promote exhaust gas energy. The end result is an exhaust that will not be the restriction in any of your horsepower goals.

TECH TIP: This is a FULL turbo back exhaust meaning it replaces all the stock pipes from the turbo to the back of the car. Includes high flow cat.