Corsa 3" Downpipe - Mk2 Audi | TT-RS | 2.5T14507 The factory downpipe on your TTRS is constructed of small diameter tubing and a restrictive catalytic converter. Replacing your factory downpipe with a high flow downpipe from CORSA is an excellent way to increase power. A straight through nonrestrictive system design maximizes airflow improving performance and fuel economy. All components; even clamps and hangers; of the system are constructed of premium grade stainless steel to ensure the look
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