Description

Unleash the full potential of your EA839-powered Audi with the Untd. Performance Catless Downpipe for B9 S4, S5, and SQ5. Built to eliminate factory restrictions and maximize exhaust flow, this downpipe transforms your 3.0T V6 into a sharper, harder-pulling performance machine. Expect faster turbo spool, a more aggressive exhaust tone, and real-world power gains—perfect for enthusiasts running tunes, upgraded intakes, or chasing maximum performance on and off the track.

Key Features:

High-Flow Catless Design

This downpipe eliminates the factory catalytic converter, replacing it with a free-flowing straight-through pipe engineered for max exhaust velocity. The result is significantly reduced backpressure, improved turbocharger efficiency, and better power delivery across the rev range.

Sharper Turbo Response

With less restriction between turbo and exhaust, boost builds quicker and throttle response is noticeably crisper. Turbo lag is reduced and mid-range torque comes on stronger, giving your 3.0T a more urgent and responsive driving feel.

Aggressive Exhaust Note

Without the cat to muffle sound, your V6T wakes up with a deeper, more pronounced tone. Expect louder cold starts, sharper spool noises, and refined growl under wide-open throttle—without the rasp of a poor-quality system.

Built for Power & Durability

Crafted from 304 stainless steel and TIG-welded for strength, the Untd. Performance Downpipe is built to handle the heat and pressure of high-performance builds. CNC-machined flanges ensure leak-free connections and perfect fitment with both OEM and most aftermarket systems.

Direct Bolt-On Fitment

Designed specifically for B9 EA839-powered vehicles, this downpipe bolts directly to the stock turbo and connects to the factory or upgraded cat-back exhaust. No cutting or fabrication required—just pure bolt-on performance.

Track-Focused, Emissions-Off Setup

This catless downpipe is designed for off-road and motorsport applications where emissions compliance is not required. It’s the ideal upgrade for tuned builds or full-stage performance packages.

Compatibility:

• 2018+ Audi S4 (B9) 3.0T V6T (EA839)

• 2018+ Audi S5 (B9) 3.0T V6T (EA839)

• 2018+ Audi SQ5 (B9) 3.0T V6T (EA839)

Whether you’re looking to prep your B9 for the dyno, the track, or the street, the Untd. Performance Catless Downpipe is a game-changing upgrade. Bigger sound, faster boost, and more power—this is how your EA839 should’ve come from the factory.

⚠️ Note: For off-road and track use only. Not emissions-compliant in all regions. Please check your local laws before installation.

A Stage 2 tune is recommend for optimal performance and not trigger an CEL.

Jackak Motorsport B9 Tune Stage 2 Available Here