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

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

Unlock the full performance potential of your Audi RS4 or RS5 with these Catless Downpipes with Heatshield — engineered to maximise exhaust flow, improve turbocharger efficiency, and keep under-bonnet temperatures in check.

Designed specifically for the 2.9L twin-turbocharged V6, these downpipes replace the restrictive factory catalytic converters, significantly reducing exhaust backpressure and allowing both turbochargers to spool faster. The result is sharper throttle response, increased power potential, and a noticeably more aggressive exhaust note.

Full woven heat shielding wraps both pipes, reflecting radiant heat away from surrounding components and helping to reduce heat soak in the engine bay — worth having on a hot-vee twin-turbo V6 working hard.

Manufactured from mandrel-bent 304 stainless steel with precision TIG welding throughout, and supplied as a matched left and right pair with the factory sensor bungs retained.

Key Features

High-Flow Catless Design

Removes the restrictive factory catalytic converters for maximum exhaust flow and performance potential.

Full Heat Shielding

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

304 Stainless Steel Construction

Corrosion-resistant 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.

Direct Bolt-On Fitment

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

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
• More aggressive exhaust note
• Ideal foundation for Stage 2 and higher-performance builds

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

Sound Characteristics

Compared to the factory downpipes, a catless setup typically delivers:

• Deeper and more aggressive V6 tone
• Increased turbo spool acoustics
• Louder cold starts
• Enhanced pops and burbles (when tuned)
• Greater overall exhaust volume

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

This is a catless motorsport product intended for off-road and motorsport use only.

Professional installation is strongly recommended.

ECU tuning may be required to fully utilise the performance benefits and prevent check engine lights associated with catalyst removal.

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.