R44 BMW S58 200 Cell Sports Cat Downpipes For BMW G80/G81 M3, G82/G83 M4 & G87 M2

The R44 BMW S58 200 Cell Sports Cat Downpipes are a premium exhaust upgrade developed to deliver a meaningful increase in performance and sound while retaining a more refined character than a full catless setup. Designed for the latest S58-powered M models, these downpipes replace the highly restrictive factory catalytic converters with high-flow 200 cell sports catalysts, significantly reducing exhaust gas back pressure. The result is quicker throttle response, faster turbo spool and stronger low- and mid-range power, without the harshness often associated with decat systems.

Each set is hand-crafted from TIG-welded 304-grade stainless steel and features CNC precision-machined flanges manufactured from billet stainless steel for durability and accurate fitment. Smooth radius bends are used throughout to minimise turbulence and maximise airflow. Following extensive road and track testing, R44 has moved from a previous 300 cell design to this 200 cell configuration to meet customer demand for improved flow and performance, while maintaining long-term reliability. Supplied with a 1 year R44 warranty and fitment guarantee, these sports cat downpipes offer a high-quality, well-balanced solution for fast road and track-focused builds.

Product Specification

• Hand-crafted, TIG-welded 304-grade stainless steel construction

• CNC precision-machined flanges from billet stainless steel

• Integrated 200 cell sports catalytic converters

• Smooth radius bends to reduce turbulence and improve flow

• Extensively tested on road and track for performance and durability

Key Features

• Far less airflow restriction than factory catalytic converters

• Noticeable reduction in exhaust back pressure

• Faster turbo spool and sharper throttle response

• Increased low-end and mid-range power

• Weight saving over OEM catalytic converters

• More refined exhaust tone compared to catless downpipes

• Reduced exhaust emissions and less fuel smell within the cabin

• Supplied with a 1 year R44 warranty and fitment guarantee

What’s in the Box?

• Set of R44 S58 200 Cell Sports Cat Downpipes

Important Note

While sports catalytic converters offer improved refinement and reduced emissions compared to catless systems, they do not guarantee prevention of a check engine light (CEL). Modern BMW DME systems can detect changes in catalyst efficiency, and these downpipes cannot be guaranteed to pass vehicle emissions testing in all regions.

Compatibility

• BMW G80 M3 Saloon (2021+)

• BMW G80 M3 Competition Saloon (2021+)

• BMW G81 M3 Touring (2023+)

• BMW G81 M3 Competition Touring (2023+)

• BMW G82 M4 Coupe (2021+)

• BMW G82 M4 Competition Coupe (2021+)

• BMW G83 M4 Convertible (2021+)

• BMW G83 M4 Competition Convertible (2021+)

• BMW G87 M2 Coupe (2023+)

Engineered specifically for the S58 platform, the R44 200 Cell Sports Cat Downpipes are an excellent choice for drivers seeking improved performance and sound with a more balanced, road-friendly character.

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.