Unlock the true potential of your Audi B9 S4 or S5 with the Untd. Performance Catless Downpipe for the 3.0T engine. Designed to eliminate the restrictive factory catalytic converter, this catless downpipe allows for maximum exhaust flow, reducing turbo lag, improving throttle response, and delivering more power throughout the rev range. Ideal for enthusiasts pushing the limits of their Audi, whether for street use or high-performance track builds.

Key Features:

Catless Design for Maximum Flow
By removing the restrictive factory catalytic converter, the Untd. Performance Catless Downpipe dramatically improves exhaust flow, reducing backpressure and allowing your 3.0T engine to unleash its full potential. This results in faster turbo spool, more power, and an overall improvement in engine responsiveness.

Enhanced Turbo Efficiency & Power Gains
With less restriction in the exhaust system, the turbochargers spool more quickly, delivering quicker acceleration and higher performance. Expect noticeable gains in both low-end torque and top-end power, translating into a more thrilling driving experience, whether you’re on the road or the track.

Aggressive Exhaust Sound
The catless design lets your 3.0T V6 engine roar with an unmistakable exhaust note. Expect an aggressive tone under acceleration, with pronounced turbo spool and crackles, adding a motorsport-inspired soundtrack to your Audi’s already performance-focused nature.

Precision Fitment & Durability
Constructed from high-grade 304 stainless steel and TIG-welded for strength, this downpipe is built to withstand the demands of high-performance driving. The precision CNC-machined flanges ensure a perfect, leak-free fit, while the robust construction provides long-lasting reliability, even under extreme conditions.

Ideal for Tuned & Performance Builds
This downpipe is a must-have upgrade for any performance build. Whether you’ve tuned your Audi or are running a larger turbo setup, the catless downpipe optimizes exhaust flow, making it the perfect complement to a Stage 2 tune or beyond.

Compatibility:

Audi S4 B9 3.0T (2019+)
Audi S5 B9 3.0T (2019+)
Engine: 3.0L V6 Supercharged/Turbocharged
Compatible with both sedan (S4) and coupe/convertible (S5) variants

Unlock the ultimate performance, sound, and driving experience with the Untd. Performance Catless Downpipe for your Audi B9 S4/S5. Designed for the enthusiast who demands more from their Audi, this downpipe is built to deliver peak performance on every drive.

⚠️ Note: This product is intended for off-road and track use only. Not emissions-compliant in all regions. Please check local regulations before installation.

2021

Untd. Performance Catless Downpipe 3.0T – Audi B9 S4/S5 2019+