i have a milltec zaust fitted to my 16v and its sweet, quiet, its a rear oval so looks standard. And if i remember correctly was 360 +vat fitted at AMD
When i priced up standard exhaust i wouldn't have got much change from £500. So all in all im very happy with it. Didnt notice any improvement in performance, but didnt really expect to as that plus good air filter will struggle to give you anymore than 3bhp anyway - fact (dont believe the hype)