Audi TT / TT Roadster 8N Valved Exhaust System (1998-2006)

The Audi TT / TT Roadster 8N exhaust in detail.

The brand’s first TT, the 8N was produced from 1998 to 2006. This page covers it in its 180 hp, 235 Nm turbocharged four-cylinder version, the figures shown by the page and its guide. The range’s other engines are not covered here; the TT 8J and 8S that succeeded it have their own pages.

This small turbo engine has more character than its factory sound suggests: Audi tuned it for efficiency and discretion. With the valves open, our valved cat-back gives it a full, sporty tone, with a few crackles on the overrun, without chasing volume for its own sake; with the valves closed, the coupé becomes as discreet as when it left the factory.

An older car and a page carried over from the old catalogue: before any manufacturing, we check your VIN, in field E of the registration document, to confirm the engine, the transmission and the condition of the system to be replaced. Fitting is done with clamps and gaskets, without welding, in about two hours; without factory valves, the Rog remote and its box in the boot control the valves.

On this small coupé, the “Manifold” option targets the front part and its catalytic converter, located between the engine and the exhaust. A TT used for leisure drives is better off taking it with 200 cells, which keep emissions control; with 100 cells, it is accepted or not depending on the car and the rules in your country, and the decat variant is reserved for track use. Without an ECU remap, expect voice and a little lightness, not power. 304 stainless steel suits a car of this age well; titanium, around 40% lighter, comes in brushed, gold or purple.