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Performance M

Remus Axle back Racing System Left/Right with Integrated valves using the OE valve control system with 4 tail pipes Ø 102 mm angled, straight cut, chromed - 3 Series G80 M3 353 kW S58B30A 2021-

Remus Axle back Racing System Left/Right with Integrated valves using the OE valve control system with 4 tail pipes Ø 102 mm angled, straight cut, chromed - 3 Series G80 M3 353 kW S58B30A 2021-

£2,480.35
£2,480.35
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Heads-up on cancellations & returns: if you cancel an order or return an item, you won't get back 100% of what you paid. We apply a 10% restocking fee, the outbound shipping is non-refundable, and we have to pass on Shopify / PayPal payment processing fees; these aren't returned to us when we refund you. International orders also lose on exchange-rate spread in both directions. If the original packaging is damaged or missing, a reboxing charge applies. For international orders specifically, if you refuse to pay our shipping invoice or supply a prepaid label after placing the order, the same deductions apply. We're upfront about this — please be sure of your purchase before ordering.

Unlock the soundtrack your BMW deserves with this premium rear section exhaust for the G80 M3. Designed for the S58B30A 353 kW engine from 2021 onwards, it brings a fierce, motorsport-inspired tone, sharper throttle response feel and show-stopping aesthetics with quad polished outlets. It retains factory valve functionality for genuine sound-on-demand, using your car’s own control system for seamless operation.

Built from full stainless steel with a bead-blasted finish, this system offers a freer-flowing path to reduce restriction and enhance performance potential, while the lighter construction helps shed unnecessary weight from the rear. Precision-engineered for a direct, accurate fit, it is crafted in Austria to an exceptional standard. The four chromed straight-cut tips, approximately 102 mm diameter, fill the M3 diffuser beautifully for a purposeful, OEM-plus look.

Why enthusiasts choose this upgrade

  • Deep, track-inspired tone with valve control via your factory electronics
  • Full stainless construction with bead-blasted finish for durability and premium appearance
  • Freer-flowing design for reduced backpressure and responsive performance feel
  • Lighter rear section compared with many stock assemblies
  • Quad polished tips complete the aggressive look without compromising refinement
  • Crafted in Austria to a high standard of fit and finish

Fitment and compatibility

  • Vehicle: BMW M3 G80 with S58B30A 353 kW engine, 2021 onwards
  • Configuration: Rear section with valve flaps that integrate with the car’s original actuators
  • Tailpipes: Four chromed, straight-cut outlets, approx. 102 mm diameter

Important: The original exhaust requires cutting during installation. Professional fitting is strongly recommended.

Installation and support

For supply and fitting, speak to MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk. This upgrade is a popular choice with our BMW customers who want a refined but assertive soundtrack and a quality stainless system that works perfectly with the car’s electronics.

Part number

081021 1400+081021 1510+0046 70SG

Key search terms

BMW M3 G80 exhaust upgrade, G80 M3 rear exhaust, BMW S58 performance exhaust, valved rear silencer M3, quad tip exhaust BMW M3, stainless steel back box G80, BMW M3 2021 exhaust, performance muffler M3 G80, UK BMW exhaust specialist, Remus M3 G80 rear section

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