I got my A3 Quattro Turbo sport in october last year. Only Mod is a Quickshift stainless air filter which has gave me a low sounding dump valve effect. Im after a duplex exhaust but wanna know what it will look like. As my car is quattro ive heard they need to custom build this to get round the rear axle. also lining up my window tints and i want a good rear spoiler. Any suggestions on good spoilers and a quality duplex exhaust.