This decat downpipe is designed for maximum exhaust gas flow in the Audi RS4 B9 and RS5 B9. By completely removing the catalytic converter, backpressure is significantly reduced, resulting in a more direct throttle response and increased performance. Suitable for left-hand drive models and intended for performance applications where engine software is modified.

Advantages

• Significantly improved exhaust gas flow
• More power and sharper throttle response
• Sportier and louder exhaust sound
• Full stainless steel construction
• Focused on maximum performance

Technical specifications

• Material: stainless steel
• Type: decat downpipe
• Without catalyst
• 1 lambda probe connection per side
• Suitable for left-hand drive models
• Original power: 450 hp

Compatibility

• Audi RS4 Avant B9 Quattro – built in 2017 →
• Audi RS5 B9 Quattro – built in 2016 →
• Left-hand drive (LHD) only

Contents

• Decat downpipe
• Mounting hardware/seals (if supplied by manufacturer)

Frequently Asked Questions

Is this downpipe street legal?
No, a decat downpipe is not street legal and is intended for circuit and motorsport use.

Is a software adjustment necessary?
Yes, the engine software needs to be modified to prevent error codes and malfunctions.

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