$740.00
Take your EA839-powered Audi B9 S4 or S5 to the next level with the Untd. Performance Catless Downpipe w/ Heat Shield. Designed for maximum power and thermal management, this upgrade removes the restrictive factory catalytic converter and adds integrated heat shielding for cooler engine bay temps and reliable long-term performance. Whether you’re building a weekend weapon or prepping for the track, this downpipe is the foundation of your power setup.
Available on backorder
Take your EA839-powered B9 S4 or S5 to the next level with the Untd. Performance Catless Downpipe w/ Heat Shield. Designed for maximum power and thermal management, this upgrade removes the restrictive factory catalytic converter and adds integrated heat shielding for cooler engine bay temps and reliable long-term performance. Whether you’re building a weekend weapon or prepping for the track, this downpipe is the foundation of your power setup.
The restrictive OEM catalytic converter is replaced with a free-flowing 3.0″ mandrel-bent stainless steel downpipe that dramatically reduces backpressure and allows your turbo to breathe. The result? Faster spool, improved throttle response, and a serious bump in horsepower and torque—especially when paired with a tune.
This version of the downpipe features built-in thermal shielding to reduce radiant heat in the engine bay, protecting vital components and helping manage intake air temps. Whether you’re in traffic or under full boost, the shielded design keeps things cooler and more consistent.
Removing the factory cat uncorks the true sound of your 3.0T. Expect louder cold starts, sharper turbo spool, deeper growl under throttle, and clean, aggressive tone without excess rasp. It’s the exhaust sound Audi should’ve delivered from the factory.
Constructed from TIG-welded 304 stainless steel and finished with CNC-machined flanges, the Untd. Performance Downpipe is made to handle high-boost, high-heat conditions with zero compromise on fit or durability. It bolts up seamlessly to OEM or aftermarket systems with no cutting or welding required.
This downpipe is built for performance-focused applications where emissions components can be removed. Ideal for dyno sessions, track days, or serious enthusiast builds looking for unfiltered performance and sound.
2019+ Audi S4 (B9) 3.0T V6T (EA839)
2019+ Audi S5 (B9) 3.0T V6T (EA839)
(Fits post-facelift models with revised exhaust routing – verify before ordering)
If you’re chasing faster spool, more power, and a meaner sound, the Untd. Performance Catless Downpipe w/ Heat Shield is the must-have upgrade for your B9 3.0T. Built to perform, built to last—and ready to rip.
⚠️ Note: For off-road and track use only. Not emissions-compliant in all regions. Check local laws before installation.
