The Unitronic Performance Downpipe for the 2017+ S4® & S5® 3.0TFSI® EA839 (CWG) engine is a direct bolt-on upgrade designed to optimally eliminate unwanted restrictions in the factory downpipe reduce turbo lag and enhance the exhaust note. It utilizes a 6? 400cpsi ultra high output catalytic converter designed in partnership with Unitronic from our emissions partners at Global Emissions Systems Inc (GESi®).

Paired with Unitronic Stage 2 Performance Software and other supporting bolt-ons this Performance Downpipe helps yield up to 467HP / 547LB-FT on the 3.0TFSI equipped B9 S4 and S5.

Warranty Registration is REQUIRED for all products integrating GESi Catalyst(s) HERE.