Hi there guys I've had my S1 about a month or so now and absolutely love it (coming from a fiesta ST) I now want to start small modifications to it and want to here from people who have fitted the turbo muffler delete is it worth it. Is the Revo induction kit any good. And what's the best cat back exhaust system. Want to Revo stage 1 but concerned about warranty/clutch any help on these subjects much appreciated