i have a MY03 STI it has a cat back exhaust and bailey bump valve.
was thinking up pipe and decat to start with (what cat is the best to remove?)
what is a good route to go down and whats it going to cost?
would be more than happy to reach some where between 320-340bhp
any help would be appreciated
Hi all,
after years of pineing for subaru i finally got one, Woohoo
2003 STi PPP Type UK.
Quick question is it ok to fit a dump valve with it have the PPP if yes any preferences?