Supersprint BMW F97 X3 M, F98 X4 M, G20 B3 & G21 B3 Stainless Steel Downpipe + Metallic Catalytic Converter

The Supersprint Downpipe + Metallic Catalytic Converter Right - Left is a precision, direct-fit stainless steel upgrade engineered for the BMW F97 X3 M, F98 X4 M, G20 B3 & G21 B3. It replaces the restrictive factory component to free up exhaust flow, sharpen throttle response and give your BMW a deeper, more purposeful note.

Supersprint has been handcrafting performance exhausts in Mantova, Italy since 1955. Every system is designed and validated on the dyno – not by assumption – using thin-wall stainless steel and carefully sized tubing that raises exhaust gas velocity while protecting mid-range torque, so you gain real, usable power across the rev range.

• Complete left- and right-hand pair – both sides included
• Handmade in Italy from corrosion-resistant stainless steel
• Dyno-developed for genuine mid-range and top-end power gains
• Direct bolt-on fit to the OEM mounting points
• Threaded bung for the oxygen sensor provided

Part of the following Supersprint exhaust systems:

• 100% Stainless steel system - Deletes the primary catalytic

Fitment – this part is compatible with:

• BMW F97 X3 M (S58 - 480 Hp - models with OPF) 2019 -> 2021 (with valve)
• BMW F97 X3 M (S58 - 480 Hp - models with OPF) 2019 -> 2021 (Racing)
• BMW F97 X3 M Competition (S58 - 510 Hp - models with OPF) 2019 -> 2021 (with valve)
• BMW F97 X3 M Competition (S58 - 510 Hp - models with OPF) 2019 -> 2021 (Racing)
• BMW F98 X4 M (S58 - 480 Hp - models with OPF) 2019 -> 2021 (with valve)
• BMW F98 X4 M (S58 - 480 Hp - models with OPF) 2019 -> 2021 (Racing)
• BMW F98 X4 M Competition (S58 - 510 Hp - models with OPF) 2019 -> 2021 (with valve)
• BMW F98 X4 M Competition (S58 - 510 Hp - models with OPF) 2019 -> 2021 (Racing)
• ALPINA B3 (G20) Sedan 4x4 (S58 - 462 Hp - models with OPF) 2020 -> 2022 (with valve)
• ALPINA B3 (G21) Touring 4x4 (S58 - 462 Hp - models with OPF) 2020 -> 2022 (with valve)

Supplied by R44 Performance, an authorised Supersprint partner, with fast UK and worldwide delivery. Need help choosing the right option for your build? Contact our team for expert fitment advice.

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.