Audi B9/9.5, RS4/RS5 Catted Downpipe With Heatshield

Audi B9/B9.5 RS4/RS5 Catted Downpipe With Heatshield

Free up the 2.9T twin-turbo V6 in your Audi RS4 or RS5 with these High-Flow Catted Downpipes with Heatshield — engineered to improve exhaust flow and turbocharger response while retaining catalytic converters for a more refined, road-friendly result.

High-flow catalysts replace the restrictive factory units, cutting backpressure without going fully catless. That keeps the exhaust note sharper but more civilised, reduces exhaust odour, and makes this the sensible choice for a daily-driven car.

Full woven heat shielding wraps both pipes, reflecting radiant heat away from surrounding components and helping to reduce heat soak in the engine bay.

Manufactured from SUS304 stainless steel with mandrel bends and precision TIG welding, supplied as a matched left and right pair with the factory sensor bungs retained. Gaskets and hardware are included.

Key Features

High-Flow Catted Design

High-flow catalysts cut backpressure against the factory units while retaining catalytic conversion for a more refined, road-friendly setup.

Full Heat Shielding

Woven shielding covers both pipes, reflecting radiant heat away from surrounding components and helping to limit heat soak.

SUS304 Stainless Steel Construction

High-grade stainless steel delivers exceptional durability and heat resistance under sustained load.

Improved Turbo Efficiency

Reduced backpressure allows both turbochargers to spool faster and operate more efficiently.

Retained Sensor Bungs

Factory oxygen sensor positions are retained so the original sensors transfer directly across.

Complete Bolt-On Kit

Designed for the 2.9T V6 platform using factory mounting locations, supplied as a matched left and right pair with gaskets and mounting hardware.

Performance Benefits (When Tuned)

• Increased horsepower and torque potential
• Faster turbo spool and improved throttle response
• Reduced exhaust backpressure
• Improved thermal management in the engine bay
• Sportier exhaust note without excessive harshness
• Excellent balance between performance and everyday drivability

Performance gains may vary depending on ECU calibration, fuel quality, and supporting modifications.

Sound Characteristics

Compared to the factory downpipes, a high-flow catted setup typically delivers:

• Sportier and more refined V6 tone
• Increased turbo spool acoustics
• Improved exhaust volume without excessive harshness
• Reduced exhaust odour compared with a catless setup

Vehicle Fitment

Audi B9 RS4 Avant (2018–2019)
Audi B9.5 RS4 Avant (2020+)

Audi B9 RS5 Coupe / Sportback (2018–2019)
Audi B9.5 RS5 Coupe / Sportback (2020+)

2.9L Twin-Turbocharged V6

Which OPF Option Do I Need?

On this platform the particulate filter (OPF/GPF) sits in the downpipe itself, so the two specifications are different parts. European-delivered facelift cars are filter-equipped; Australian and North American cars are not.

NON OPF - AU/US SPEC — for vehicles delivered new in Australia, New Zealand, the United States or Canada.

OPF EQUIPPED - EU SPEC — for vehicles delivered new in the European Union or the United Kingdom.

UNSURE - CONTACT US — select this and our team will confirm the correct specification against your VIN before dispatch.

Please Note

Professional installation is strongly recommended.

ECU tuning is recommended to maximise performance and prevent potential check engine lights.

This product may not comply with road-use emissions regulations in all jurisdictions. It is intended for off-road or motorsport use where permitted by local regulations.

Why Choose Proven Performance Parts

We specialise in high-performance parts for European vehicles — including Volkswagen GTI & R models, Audi S/RS platforms, and BMW M vehicles. Every product we offer is carefully selected for its quality, fitment, and real-world performance — tested by enthusiasts, for enthusiasts.