Our exhausts have earned praise from owners and the press alike, due to their unique "Jekyll and Hyde" personality. We spend considerable time and effort during development to achieve remarkable civility when idling and at part throttle cruising, while also producing a war-cry wail when full throttle is applied. Our exhausts are like bespoke suits: each is hand made utilizing only the finest casing and packing materials, and they command respect without calling unwanted attention to themselves. Sophisticated, refined, and powerful, all at once. Manual transmission system is a catback design, Tiptronic is a midpipe back design and reuses the stock downpipe. We spent considerable time examining how to maximize the performance and options of this exhaust system. The AWE Tuning exhaust boasts features you will not find on any other system on the market, ensuring unmatched power, fitment, and sound levels. Each system is mandrel bent T304 stainless steel, and the manual transmission model is a full catalytic converter back design. Since the catalytic converter resides in the engine bay with the A4 1.8T, an exhaust system is only considered a catalytic converter back design if the downpipe that comes off the catalytic converter is also part of the system. Not only does our manual transmission system include a downpipe, but it is a whopping 2.5" in diameter, guaranteeing maximum flow even with big turbo kits. The AWE Tuning exhaust makes the stock system look puny in every way. Our straight through resonators and mufflers ensure flow while keeping the noise level down to civilized volume. There is very minimal drone with this system. Our signature 3.5" beveled exhaust tips sport laser etched AWE Tuning logos and are double walled to ensure a mirror polish even under hard usage. Both tips are individually adjustable, too, to provide for perfect fitment even with European and aftermarket bumpers. Further, this system features a Lifetime Warranty.