Give your 1.8T the power and sound it deserves with the Untd. Performance 3″ Catless Downpipe. Designed for Audi A4 B5/B6 and VW Passat models equipped with the legendary 1.8T 20V engine, this high-flow upgrade removes factory restrictions and unlocks real performance gains. With a full 3” design and catless configuration, it delivers faster turbo response, increased horsepower, and a more aggressive exhaust tone—built for enthusiasts who demand more from their turbocharged setup.