CTS Turbo Audi A4 / A5 (B8) Test Pipe / High Flow Catalytic Converter Downpipe Upgrade Add high flow catalytic converter::Yes (+$100) Our piston design ensures long

Our piston design ensures long life

3) replaces the factory plastic unit which has been prone to failure from torn diaphragms

mandrel bent 3" stainless steel tubing

Higher charged air temperatures can result in boost cut and timing pull

CTS Turbo Audi A4 / A5 (B8) Test Pipe / High Flow Catalytic Converter Downpipe Upgrade Add high flow catalytic converter::Yes (+$100) Our piston design ensures longThe CTS B8 A4 A5 2. 0T test pipe is the premier test pipe for your Audi A4 or A5 2. 0T. Our test pipe is designed to seamlessly fit in place of your restrictive stock catalytic converter, which is situated immediately after the turbocharger. Our test pipe features 3" stainless steel piping, smooth mandrel bends. Substantial power gains, improved exhaust flow and a more throaty sound are the main benefits from installing our test pipe. Upon inspection