$220.00
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.
Available on backorder
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.
The factory downpipe and catalytic converter are serious choke points for your turbocharged 1.8T. The Untd. Performance Downpipe replaces them with a straight-through, mandrel-bent 3” system for maximum flow and minimal backpressure. Turbo lag is reduced, exhaust velocity is increased, and the engine breathes the way it was meant to.
Freeing up the exhaust flow also brings your 1.8T’s tone to life. Expect a deeper, more aggressive sound with pronounced turbo spool and satisfying pops on lift-off. It’s the unmistakable sound of performance—and it’s finally uncaged.
By removing the restrictive catalytic converter and opening up the exhaust path, this downpipe supports significant horsepower and torque improvements—especially when paired with a tune. Boost comes on faster, throttle response is improved, and the car feels much more alive throughout the rev range.
Built from robust 304 stainless steel, this downpipe is made to handle high temperatures and high-boost applications. TIG-welded joints and CNC-machined flanges ensure long-lasting durability, a secure fit, and leak-free performance under pressure.
Engineered for a direct fit on the 1.8T 20V engine, this downpipe bolts up to the stock or aftermarket turbo and exhaust system with no cutting or welding required. All necessary hardware is included for a smooth, DIY-friendly installation.
This catless downpipe is designed for off-road and race use only. It’s perfect for enthusiasts looking to build track-ready 1.8Ts, big-turbo street cars, or tuned weekend warriors in regions where emissions compliance isn’t required.
Audi A4 B5 1.8T 20V
Audi A4 B6 1.8T 20V
VW Passat 1.8T 20V (B5/B5.5)
For 1.8T enthusiasts ready to unlock the full potential of their turbocharged setup, the Untd. Performance 3″ Catless Downpipe is the essential first step. From quicker spool to bigger power and a bold exhaust note, it’s built to perform—on the street, at the track, and everywhere in between.
⚠️ Note: For off-road and track use only. Not emissions-compliant in all regions. Please verify local regulations before installation.
A Stage 2 ECU tune is recommended for proper usage of this downpipe.
