Large stainless steel downpipe for 2.5L TFSI in the Audi RS3 8V and TTRS 8S. This high-quality, large stainless steel downpipe is 3.5" at the turbocharger outlet and leads into 2x 63.5mm to the catalytic converter connections. The downpipe is fitted directly to the outlet of the turbocharger and guides the exhaust gases to the catalytic converter. The larger the diameter of the downpipe, the better for the engine's power delivery. The exhaust back pressure is reduced and the service life of the turbocharger is positively influenced. The main advantages: Plug & Play Elimination of the pre-cat TIG welded Significant increase in performance (up to 30 hp and 30 Nm!) Much faster acceleration of the engine Lower exhaust gas temperatures and exhaust back pressure Longer service life of the turbo and engine The downpipe is suitable for the original Audi RS3- and TTRS- exhaust system, or on suitable cat replacement pipes. The downpipe is not road legal Manufacturer Information about the manufacturer BAR-TEK BAR-TEK Motorsport GmbH Im Rauschen Auel 3, 51491 Overath-Brombach, Germany info@bar-tek.com