gerry
Octane Boostaholics
I've been told I have a full prodrive exhaust system on the car even though it says sti on the backbox ( I know Nothing about mechanics or the like anyway). these things cost big bucks I'm told too .. what bhp gains would you expect with it. also the cat has been takin out .. can this be put back in or do I need to put back in the old exhaust when I get it as it won't pass an nct without it