Hi there - if its exhausts you're interested in I can't recommend Powerflow highly enough. They'll fit you a stainless system, from the cat back (to keep the MoT happy), in whatever specification you'd care. AND (perhaps most importantly) they'll offer you impartial advice, and won't sell you anything you don't need. For around £300, including VAT, fully fitted, you get a bespoke system with a lifetime guarantee that not only looks the mutt's nuts, but also delivers both in terms of sound and performance. That said, bear in mind that a flashy exhaust won't make a massive difference to any engine...and that goes from 1 litre all the way up to a GTi. What you get is better breathing...therefore better engine response...and therefore a more satisfying drive.
Oh yeah, there's also the excellent noise they make and the lovely chrome tailpipes they do!
Check out this link for their website, the've got dealerships all over the place.
www.powerflowexhausts.net/HOME.CFM
And I'll post some pics of my system to show you the finished product.
Matt[/url]