Cobra Sport Audi RS3 (8Y) Saloon/Sedan OPF/GPF‑Back Axle‑Back Rear Sports Exhaust | Performance Back Box Upgrade | 2021‑On RS 3 Rear Section, Sound Upgrade, UK

Turn up the five‑cylinder soundtrack on your RS 3 8Y sedan

Give your four‑door RS 3 the voice it deserves with this Cobra Sport OPF‑back rear section. Designed to replace the pipework after the particulate filter, this track‑inspired, road‑ready sports system delivers a deeper, crisper tone and a more aggressive presence without touching the factory emissions hardware. It is the perfect sound upgrade for daily driving, spirited B‑road blasts and show‑and‑shine weekends.

Why this OPF‑back rear system

• Enhances the iconic 5‑cylinder note with a richer, sportier soundtrack
• Replaces the section after the GPF for a hassle‑free, emissions‑friendly upgrade
• Precision fitment with factory‑style mounts for a straightforward install
• Developed on circuit, tuned for the street for a refined cabin experience
• Quality UK craftsmanship from Cobra Sport for long‑lasting performance

Perfect for RS 3 8Y sedan owners seeking

• OPF‑back exhaust upgrade, rear section exhaust, sports back box
• Sound enhancement without removing the gasoline particulate filter
• Road‑friendly tone that still amplifies character and presence
• A premium UK performance exhaust brand with proven results

What you can expect

Sharper start‑up bark, a fuller mid‑range note and a purposeful, motorsport‑inspired presence outside the car. Inside, it remains composed for commuting and long journeys. We have fitted these systems for RS 3 customers and the feedback has been consistently positive for tone, build quality and fit.

Fitting and support

Want it installed professionally? Book fitting with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a tailored quote and availability. We can supply, fit and advise on complementary upgrades to complete your build.

Media

Developed on the track, released for the road.

Search‑friendly terms to help you find this product

RS 3 8Y sedan exhaust upgrade, OPF‑back exhaust system, GPF‑compatible rear section, sports rear system for RS 3, back box upgrade, performance rear section, sound upgrade for RS 3 8Y, Cobra Sport RS 3 exhaust, UK performance exhaust supplier.

Ready to transform your RS 3’s character? Add to basket or contact us for fitting.