impreza_sti_08 Posted July 4, 2019 Share Posted July 4, 2019 Any pointers as to the best exhaust to unlock the scooby rumble on the hatchback STI. Cheers Quote Link to comment Share on other sites More sharing options...
Jay762 Posted July 7, 2019 Share Posted July 7, 2019 unequal headers and replace the standard exhaust middle section with straight through pipework - had the prodrive backbox on mine which had a non obtrusive sound but you could replace the standard backbox as well if you need more volume Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.