BMW B58 Gen 2 OPF Decat Downpipe (G Series M240i, M340i, M440i, Z4 M40i, Supra A90 & more)

Unleash the full potential of your BMW B58 Gen 2 engine with this high-performance decat downpipe. Designed for enthusiasts seeking improved performance and aggressive sound, this downpipe is compatible with popular BMW G Series models such as the M240i, M340i, M440i, Z4 M40i, and Toyota Supra A90.

This premium-grade downpipe is crafted for optimal exhaust flow, reducing backpressure to maximise horsepower and torque gains. Enjoy faster turbo spool times, a more exhilarating exhaust note, and an overall enhanced driving experience. Perfect for both track enthusiasts and street drivers looking to improve performance, it’s a must-have upgrade for B58 owners.

Downpipe Specification

• Full Stainless Steel 304 Construction
• Stainless Steel Flex Joint
• Inner Stainless Liner for Durability & Longevity
• Deeper Exhaust Note
• Better Turbo Spool
• Improved Throttle Response

Compatibility

• BMW G42 M240i xDrive 374PS 2021 OPF Model
• BMW G20/21 M340i 3.0L 285KW/374PS 2019 OPF Model
• BMW G22 440i 3.0L 285KW/387PS 2019 OPF Model
• BMW G30/31 540i 3.0L 250KW/340PS 2018 OPF Model
• BMW G32 640i 3.0L 250KW/340PS 2018 OPF Model
• BMW G11/12 740i 3.0L 240KW/326PS 2019 OPF Model
• BMW G14/15/16 840i 3.0L 250KW/340PS 2019 OPF Model
• BMW Z4 G29 M40i 3.0L 250KW/340PS 2019 OPF Model
• Toyota Supra MK5 A90 & A91 GR 3.0L 250KW/340PS 2019 OPF Model

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.