4 inch - 101.6mm - RACE downpipe for RS3 8V - TTRS 8S - DAZA DNWA

The HPerformance 4 inch 101.6mm downpipe comes directly from the development of our 1/4 mile vehicle into series production. It is the first downpipe in the world to be built with this pipe diameter throughout. It starts at the turbo outlet and replaces the standard pre-catalyser. Depending on which variant you order, you will either have no catalytic converter, two 100-cell catalytic converters or two 400-cell catalytic converters (our TÜV variant).

The pipe diameter reduces the exhaust back pressure by up to 30% (depending on the boost pressure, the turbocharger and other peripherals) and thus massively reduces the tendency of the engine to ‘knock’ on cylinders 2 and 3 - which starts at the latest at 700 hp on 102 octane and 820 hp on E85. During our turbocharger development, we were able to determine several times that the difference between 3.5 inches (88.9 mm) and 4 inches (101.6 mm), even with a downpipe directly on the bottom of the vehicle, resulted in up to 20 hp and 25 Nm as well as a reduction in exhaust back pressure of up to 0.15 bar.

These advantages are now also available for the road, as the downpipe has been made ready for series production.

Any modification to catalytic converters (replacement, change of cells or size - different from the original state) requires a software adaptation of the engine control unit. With our remote flash solution, we also offer suitable tuning for the DNW 2.5 TFSI.

Important: Our so-called TÜV catalytic converter / TÜV downpipe is supplied without TÜV documentation. In combination with our software and hardware, it fulfils the requirements for TÜV registration and can be registered at our premises or at one of our authorised dealers. The downpipe is not legal without this registration.