Non-Resonated Cat-Back Exhaust System for Audi RS4 B9 Avant 2.9 V6 Biturbo DECA 331 kW 2017+
Unlock the full sound and performance of your Audi RS4 B9 Avant with this non-resonated cat-back exhaust system. Designed for the 2.9 V6 Biturbo DECA engine, this valved quad-exit system delivers an aggressive racing sound, superior flow with low back pressure and a perfect fit on the RS4 platform. It retains factory valve control via the OEM vacuum-operated system and is handmade in Austria from 100 percent stainless steel with a premium shot-blasted finish. EEC homologation gives you confidence in quality and compliance.
Key features
- Aggressive racing sound with OEM vacuum-operated valve control
- Non-resonated cat-back design for maximum tone and flow
- Shot-blasted surface, 100 percent stainless steel construction
- Low back pressure for performance gains and sharper response
- Lightweight construction with perfect shape and fitment
- Handmade in Austria with exceptional build quality
- EEC homologation
- Quad 84 mm tailpipes with multiple tip style options
Vehicle compatibility
- Make: Audi
- Model: RS4 (also commonly searched as A4 RS4)
- Type: B9 Avant
- Engine: 2.9 V6 Biturbo
- Engine code: DECA
- Output: 331 kW
- Year: 2017+
Important: only for vehicles without GPF or OPF.
Tailpipe options (Ø 84 mm, quad exit)
- Straight, carbon insert
- Angled, carbon ring
- Black Chrome, straight, carbon insert
- Full carbon, angled, titanium internals
- Angled, rolled edge, chromed
Why choose this RS4 B9 exhaust
This non-resonated valved cat-back exhaust system transforms the RS4 B9 with a deeper idle, crisp crackles on upshifts and a fierce wide-open throttle tone, while maintaining civilised manners when the valves close. The OEM valve integration keeps driveability intact and the precision-engineered pipework reduces back pressure for improved flow. The result is a premium performance exhaust that looks as good as it sounds.
Fitted and loved by Nforcd customers
We have installed and used this Audi RS4 B9 non-resonated valved cat-back exhaust at Nforcd and customer feedback has been outstanding on sound quality, fitment and finish. If you would like professional fitting, we offer installation at our Warwickshire workshop. Request a quote at Sales@nforcd.com.
Search-friendly models and terms
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