Cyphers are good, but doing just the catback's a bit pointless as the bottle-neck at the dump pipe is still there, might as well spend a bit more and do it properly by change the turboback to 3" with hi-flow cat (or catless if you really keen). for MY01+ models it's best to retune the ECU otherwise u might get power lose and running lean.........unlike the classic shape where it's much easier for bolt-ons