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Remus Non-Resonated Cat back System Left/Right with Integrated valves using the OE valve control system with 4 tail pipes Ø 102 mm angled, straight cut, chromed - 5 Series F90 M5 Competition 460 kW S63B44B 2018-

Remus Non-Resonated Cat back System Left/Right with Integrated valves using the OE valve control system with 4 tail pipes Ø 102 mm angled, straight cut, chromed - 5 Series F90 M5 Competition 460 kW S63B44B 2018-

Regular price £3,583.92
Regular price Sale price £3,583.92
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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.

BMW M5 F90 Competition performance exhaust upgrade for S63B44B V8

Transform your 2018 onwards M5 F90 Competition with a premium Austrian-built catback from Remus. Expect a ferocious motorsport tone under load, refined quality at cruise thanks to factory valve management, and a serious uplift in character for the twin-turbo V8.

This system features quad 102 mm straight-cut, chrome-finished tips with an angled presentation that fills the rear valance perfectly. The large-bore 84 mm pipework and free-flowing layout reduce restriction for sharper throttle response and a stronger soundtrack, while the shot-peened surface and full stainless construction deliver durability and a high-end finish.

Why enthusiasts choose this upgrade

  • Valve-controlled sound using the car’s original electronics for seamless operation
  • 84 mm bore for reduced backpressure and improved efficiency
  • Quad 102 mm polished tips, straight-cut and angled for an aggressive look
  • Full stainless steel throughout with shot-peened finish
  • Lighter than the factory system and engineered for precision fit
  • Crafted in Austria with exceptional build quality

Fitment and important notes

  • Application: BMW 5 Series F90 M5 Competition, 2018 onwards, S63B44B
  • For vehicles equipped with OPF/GPF
  • This system replaces the GPF. The particulate filter must be electronically deactivated via ECU calibration to prevent engine management warnings
  • The original BMW heat protection for the tank must be used: OE part number 51 48 8 060 077

Part number

089317 0000+089618 0500LR+0446 70SG

Our experience

We have installed this Remus setup for customers and the feedback has been outstanding. Clients love the aggressive tone on throttle, the quality of the tips, and the OEM-like valve integration. It looks right, fits right, and sounds superb.

Professional installation

For fitting, speak to the specialists at MJ Modifications in Warwickshire. Request a quote: info@mjmodifications.co.uk.

Technical highlights

  • Large 84 mm pipe diameter
  • Stainless steel construction
  • Shot-peened surface finish
  • Integrated valve hardware for factory control

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