Performance Catted Downpipes for Audi RS Q8 (2020-2024) 4.0L

High-Flow Performance Catted Downpipes for 2020-2024 Audi RS Q8 (4M8)

What it Does: The Performance Catted Downpipes replace restrictive factory catalytic converters on the 2020-2024 Audi RS Q8 to reduce turbo backpressure, accelerate spool response, and lower exhaust gas temperatures without removing catalytic filtration.

The Stock Audi RS Q8 Exhaust Backpressure Restriction

The factory exhaust plumbing on the EA825 4.0-liter twin-turbocharged V8 routes exhaust gases through dense, high-cell-count ceramic catalytic substrates located in the hot-vee configuration. This packaging generates excessive pre-turbine backpressure and traps intense radiant heat inside the engine bay. The resulting heat soak increases exhaust gas temperatures (EGTs), delays boost onset, and restricts volumetric efficiency under sustained wide-open throttle.

The Engineering Solution

Engineered from mandrel-bent T304 stainless steel, these high-flow catted downpipes eliminate flow bottlenecks directly at the turbine discharge flanges. High-efficiency metallic catalytic cores minimize resistance to exhaust velocity while retaining catalyst functionality, ensuring faster transient turbo spool. Integrated multi-layer thermal heat shields reflect critical radiant energy away from surrounding hot-vee components, while precision TIG welding and direct-fit OEM-style flanges guarantee structural integrity under extreme thermal cycling.

What's Included

• 1 x Pair Stainless Steel High-Flow Catted Downpipes with Integrated Heat Shields
• Secondary O2 Sensor Extenders

Technical Specifications

Compatibility

• 2020-2024 Audi RS Q8 4.0L V8 Twin-Turbo (4M8)

Frequently Asked Questions & Fitment Warnings

Does this fit the 4M8 RS Q8?

Yes, this is a direct bolt-on fit for the 2020-2024 Audi RS Q8 equipped with the EA825 4.0L twin-turbocharged V8 engine.

Are ECU calibrations required after installing these downpipes?

While secondary O2 sensor extenders are supplied to space the sensors away from raw exhaust streams, an ECU calibration is strongly recommended to optimize fueling and boost maps for reduced exhaust backpressure.

The Audi Precision Standard

Built for exacting European engineering requirements, these performance downpipes deliver precision tolerance matching at the factory turbo outlet flanges, structural fatigue resistance, and robust thermal isolation suited for high-load track and autobahn conditions.