There are gains with any hfc with out mapping but to get the best out of it you need a new fuel pump and map to match.
Noise wise it will be very raspy it not a noise everyone likes !!
I'm assuming we are talking about the high flow cat? Its got to be quieter than a test pipe (De-cat) right? When i fitted my decat it was like another map the restriction is obviously high with the stock cat. Has anyone actually fitted a high flow cat to the b7? im interested too as it would make things easier come MOT time. I have a full 3" decat now with milltek and ko4 shoving out nearly 340ps so even if this dropped 10ps over the full decat its still gonna be a worthwhile mod for the cash and lack of hassle putting your cat back on every year?
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.