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 is very restrictive! By removing the super restrictive stock downpipe, you...
Tagged: sti downpipe
Instant Horsepower Boost! 3″ STi Downpipe w/ High Flow Cat
The stock sti downpipe and cat are some of the most restricted pipes we’ve EVER seen. Nasty! I like this pipe because not only does it replace the stock downpipe, it also repalces the...
