Remus Switchable Valved Cat-Back/Catback Exhaust for Audi RS5 4.2 FSI V8 (B8

Remus switchable sports cat back for Audi RS5 4.2 V8 (8T B8) — non resonated, stainless, EEC homologated

Give your B8 RS5 Coupé the soundtrack and response it deserves. This Remus valve-controlled cat back uses the factory vacuum-operated flap system, so you get a fierce, motorsport-inspired tone when open and a refined, long‑journey-friendly note when closed. Handmade in Austria from premium stainless steel with a shot blasted finish, it is engineered for reduced restriction, precise fitment and long-term durability.

We have supplied and fitted this system ourselves and customer feedback has been consistently positive on volume, quality and drivability. If you are searching for an RS5 4.2 V8 sports exhaust that integrates with OE valve control and delivers a deep V8 bark without compromising day-to-day use, this is the one.

Why enthusiasts choose this system

• Switchable sound via the original valve control for true daily usability
• Lower backpressure design to sharpen throttle response and driveability
• 100% stainless steel construction with shot blasted surface for longevity
• Handmade in Austria with exact alignment on the 8T platform
• EEC homologation for peace of mind
• Twin rear silencer layout tailored specifically to the RS5 4.2 FSI V8

Key details

• Type: Non resonated cat back with left and right rear silencers
• Valve actuation: Vacuum-operated flaps using OE control
• Material: Stainless steel, shot blasted
• Design focus: Flow optimisation, reduced restriction, authentic V8 character
• Approval: EEC homologated

Compatibility

• Vehicle: Audi RS5 Coupé (8T B8)
• Engine: 4.2 FSI V8, 331 kW
• Model years: 2012 onwards
• Important: For cars without a petrol particulate filter

What to expect

• Deeper, more pronounced V8 soundtrack under load with crisp upshifts
• Controlled cabin volume with valves closed for relaxed cruising
• Smoother, more eager response thanks to reduced exhaust restriction
• Clean OE-style fit and finish that complements the RS5 rear end

Fitting

Professional installation recommended. MJ Modifications in Warwickshire can supply and fit this system for you. Request a fitting quote at info@mjmodifications.co.uk.

Trusted by RS5 owners

We have run this Remus setup and installed it for customers across the UK. Owners consistently praise the balance of aggression and comfort, the premium build quality and the seamless valve integration with the factory controls.

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