GrimmSpeed Limited Series Catted Divorced Downpipe 2002-2007 WRX / 2004-2007 STI
The Grimmspeed downpipe has been carefully engineered to provide the enthusiast looking to make more power with a great increase in performance. Grimmspeed believes that a downpipe should be one of the first modifications performed on your vehicle due to the fact that the factory downpipe design is very restrictive.
This particular downpipe has been fabricated from 304 stainless steel construction and features a thick ½” flange designed to resist warping and leaks in the most extreme driving conditions. Also featured is a high-flow, 300 cell catalytic converter, and it comes with 2 welded bung provisions for those of you who want to add a wideband 02 meter. More importantly because of the smooth mandrel bends combined with the 3" increased piping diameter, you will get reduced turbo lag, improved throttle response, along with increases in horsepower nad torque.
New gaskets and hardware will be supplied to make this downpipe ready for the installation.