Free up your Focus ST's engine with the COBB 3" Downpipe! This
direct replacement for the factory downpipe features a 200 cell count
high flow catalytic converter and 304 stainless steel tubing. The CNC
machined v-band flange and 4" flex section ensures perfect OEM-like
fitment. All of these features combine to provide a free flowing exhaust
outlet for high energy exhaust gases to reduce turbo back pressure and
increase turbo efficiency. This downpipe is the perfect step towards
Stage 3 power! Stage 3 off-the-shelf maps are available for the Focus ST
Accessport for a perfectly tuned out-of-the-box experience.