This stainless steel decat downpipe with an integrated heat shield was developed for maximum exhaust gas flow in the Audi RS4 and RS5 B9. By completely removing the catalytic converter, backpressure is significantly reduced, resulting in a more direct throttle response, a more aggressive exhaust note, and increased power potential. The heat shield helps reduce heat buildup in the engine compartment, especially during sporty use.

Advantages

• Maximum exhaust gas flow
• More aggressive and sportier sound
• Improved throttle response
• Power potential up to approximately 450 hp
• Heat shield reduces heat load in the engine compartment
• Direct bolt-on mounting

Technical specifications

• Material: stainless steel
• Version: without catalytic converter (decat)
• Includes heat shield
• 1 lambda connection per side
• No OPF/GPF temperature sensor connections
• Engine software modification required

Compatibility

• Audi RS4 B9 Quattro – built in 2017 and later – left-hand drive
• Audi RS5 B9 Quattro – built in 2016 and later – left-hand drive

Contents

• Decat downpipe with integrated heat shield

Frequently Asked Questions

Is this downpipe allowed on public roads?
No, due to the lack of a catalytic converter, this downpipe is only intended for circuit and motorsport use.

Is ECU tuning mandatory?
Yes, without modified engine software, error codes can occur and the performance benefit will not be utilised.

Does this downpipe fit right-hand drive models?
No, this version is only suitable for left-hand drive vehicles.