Category: STi Downpipe


Catless Shorty Downpipe

Direct bolt on and replacement for primary cat section. Replaces only the primary catalytic and retains the secondary cat maintaining a stock look and still getting a nice increase in hp and better spoolup....


How to install an STi Downpipe

Adding an aftermarket downpipe to a Subaru WRX STi is one of the EASIEST ways to increase STi horsepower and torque.! The stock STi downpipe is very restrictive! By removing the super restrictive stock...