Category: STi Downpipe

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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....

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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...