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!
Another good point of mentioning is this pipe “should” keep you legal in states that have sucky emissions! Also this pipe comes with the option of adding a check engine light fix (cel fix) I recommend adding this part, it’s cheap and it works to keep them damn pesky cel’s out of your life.