Scorpion BMW G90 & G99 M5 Cat Back Exhaust System

The Scorpion BMW G90 & G99 M5 Cat Back Exhaust System is the most complete exhaust upgrade available for BMW’s latest M5 platform, combining Scorpion’s GPF-back (axle-back) system with their GPF delete midpipes into one fully integrated solution. Developed and handcrafted in the UK by Scorpion Exhausts, and refined through real-world collaboration with us at R44 Performance, this system is engineered to deliver a deeper, more authentic V8 sound alongside improved exhaust flow and overall driving engagement.

Designed specifically for the S68 twin-turbo V8, the cat-back system replaces the factory exhaust from the mid-section through to the tailpipes, creating a cohesive setup that maximises sound potential while maintaining precise fitment and premium build quality. Manufactured from T304 motorsport-grade stainless steel and precision TIG-welded throughout, this is a no-compromise solution for G90 M5 Saloon and G99 M5 Touring owners seeking the ultimate Scorpion exhaust configuration.

What’s Included?

This Scorpion cat-back system is made up of:

• Scorpion BMW G90 & G99 M5 GPF / Axle-Back Exhaust System

• Scorpion BMW G90 & G99 M5 GPF Delete / Exhaust Midpipes

Together, these components form a complete cat-back exhaust system, replacing restrictive factory sections and delivering the fullest sound profile Scorpion offers for the G9X M5 platform.

Scorpion GPF / Axle-Back Exhaust System

The GPF-back section is engineered to enhance sound while retaining full compatibility with BMW’s factory electronic valve control and driving modes. Its twin 80mm equal-length design helps balance exhaust flow between both banks, producing a deeper, more controlled exhaust note. Integrated electronic valves and actuators allow seamless switching between refined cruising and a more aggressive sound profile at the press of a button.

Available with a choice of 100mm Daytona or Ascari tailpipes, the axle-back section also delivers a significant visual upgrade at the rear of the car, perfectly complementing the M5’s bold styling.

Scorpion GPF Delete Exhaust Midpipes

The Scorpion GPF delete midpipes replace the restrictive factory GPF units with free-flowing, equal-length pipework, dramatically reducing back pressure and unlocking the true tone of the S68 engine. Constructed from mandrel-bent T304 stainless steel and TIG-welded for strength and precision, these midpipes sharpen throttle response and create a more aggressive, resonant exhaust note.

This component is intended for off-road and motorsport use only, making it ideal for owners seeking maximum sound, improved flow, and greater tuning potential.

Tailpipe Finish Options

Choose from 100mm tailpipe finishes to suit your build:

• Polished Daytona – clean, OEM-inspired appearance

• Black Ceramic Daytona – subtle and aggressive

• Carbon Fibre Ascari – premium, performance-focused aesthetic

Key Features

• Complete cat-back exhaust system for BMW G90 & G99 M5

• Twin 80mm equal-length exhaust design

• Manufactured from T304 motorsport-grade stainless steel

• Precision TIG-welded and mandrel-bent construction

• Compatible with OEM electronic valve control and driving modes

• Includes electronic exhaust valves and actuators

• Significantly improves exhaust sound, flow, and throttle response

• Designed, developed, and handmade in the UK

• Developed with input from R44 Performance

Compatibility

• BMW G90 M5 Saloon (2024+)

• BMW G99 M5 Touring (2024+)

Technical Specifications

• Pipe Diameter: Twin 80mm

• Material: T304 stainless steel

• Configuration: Full cat-back exhaust system

• Valve Control: OEM electronic valve compatible

• Tailpipe Options: Polished Daytona / Black Ceramic Daytona / Carbon Fibre Ascari

Why Choose the Scorpion Cat Back System?

This Scorpion cat-back exhaust is the ideal choice for G90 and G99 M5 owners who want the most complete sound and flow upgrade available. By combining the GPF-back system with GPF delete midpipes, it delivers a dramatic transformation in exhaust tone, improved responsiveness, and a premium finish throughout — all backed by UK manufacturing quality and real-world development experience from R44 Performance.

For customers seeking the ultimate Scorpion exhaust solution for their BMW G9X M5, this cat-back system sets the benchmark.

Unless explicitly stated otherwise, all products sold by R44 Performance Limited are designated RACE ONLY and are solely for competition or off-road use limited to racing formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, may violate local, state, and Federal laws. R44 Performance Limited does not implicitly or explicitly confirm the legality of using any products it sells on public roads; that is entirely the responsibility of the consumer.

It is the responsibility of the customer to check with all federal, state local and environmental laws before ordering and installing a product. R44 Performance Limited is not responsible for any fees, fines or costs that a customer may incur as a result of failing to check with federal, state, local or environmental laws before ordering and installing a product.

We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.

We totally understand if you're not certain a part will be compatible with your car, so we highly recommend contacting us here with your query. Our friendly sales team will then be in touch to confirm if this part is the correct part you are looking for.

All in stock products ship the same day if ordered before 2pm GMT

For out of stock items we will contact you with an estimated wait time if not otherwise specified above.

We offer worldwide shipping on all products. If upon receiving your product you wish to return; we offer a 30-day returns policy. For our in-depth returns information please follow the link. "R44 Returns Policy

All of our products come with a standard warranty of 1-3 years. This is dependant on the type of product however. For more details please see our warranty page here.