5.2 Inch B58 Downpipe
F & G Chassis · BMW M140i, M240i, M340i, M440i, 540i, 640i, 745E, 840i, Z4, Supra & XDRIVE · (OPF & V-Band Flange Type)
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Description
The BMW B58 Downpipe Catless or High Flow Catted is the best mod you can do. Do you want to unlock high horsepower numbers with your BMW B58 Engine in your BMW M140i, M240i, M340i, M440i, 540i, 640i, 745e or Supra 3.0? Installing a B58 Downpipe for your BMW B58 will provide great performance and is the best bang for buck modification. Purchase your B58 downpipe for more performance.
DCE Parts - B58 Downpipe - F & G Chassis - BMW M140i, M240i, M340i, M440i, 540i, 640i, 745E, 840i, Z4, Supra & XDRIVE - (OPF & V-Band Flange Type)
The downpipe is 5.2 inch (132mm) measured at the biggest point including heat shield. The downpipe is 5.1 inch (129mm) excluding the heat shield
Through the placement of a bigger B58 Downpipe the turbo spools up quicker due to a lower back pressure. The turbo starts to build up pressure at lower speeds. It also manages to build up pressure quicker after gear changes. The installation of the B58 Downpipe alone usually provides 15 HP and 25Nm extra. By installing the downpipe, you will enhance the sound of your vehicle as well.
For proper operation and optimal power output, the vehicle will need remapping of the ECU to accommodate the catless downpipe. This product is not suitable for road use.
Options
Most DCE Parts Downpipes can be specced with a full straight Decat, a Catalytic Converter Look (but with empty cat) or with a High Flow Cat.
DCE Parts introduced a line up of B58 Downpipes that not only offer more performance, but also much nicer sound. The DCE Parts Downpipes are optionally specced with a Catalytic Look while being catless, for enhanced sound and a OE/Catted look. The DCE Parts Downpipe can also be fitted with a High-Flow Cat.
Note:
The Catless downpipes and Catless Catalytic Look B58 Downpipes are only suitable for off-road use. The 200 Cell Sport Metallic Catalytic Converter B58 Downpipes are suitable for road use in most Countries. We recommend to check your local law before purchasing the downpipes.
Contact us for more information.
Please check the outlet type of your OEM B58 Downpipe, this part is suitable for vehicle with the OPF & V-Band Flange Type, see image. The difference usually is OPF and no OPF filter.
Please note that the B58 downpipe only fit on cars with OPF and V-Band Flange Type
Please feel free to contact us to ask for the correct fitment.
For the SLIP ON NON OPF variant, please follow this link:
- BMW 2-Serie G42 M240i 374hp - 2021+
- BMW 3-Serie G20 M340i 374hp - 2020+
- BMW 3-Serie G21 M340i 374hp - 2020+
- BMW 5-Serie G30 540i 340hp - 2018+
- BMW 5-Serie G31 540i 340hp - 2018+
- BMW 5-Serie G30 545e 394hp - 2020+
- BMW 6-Serie G32 640i 340hp - 2018+
- BMW 7-Serie G11 740i/745e - 2019+
- BMW 8-Serie G14 840i 340hp - 2019+
- BMW 8-Serie G15 840i 340hp - 2019+
- BMW 8-Serie G16 840i 340hp- 2019+
- BMW Z4 G29 M40i 340hp - 2019+
- Toyota Supra MK5 A90 GR 3.0 340hp - 2019+
- Toyota Supra MK5 A91 GR 3.0 382hp - 2021+
In some cases, the 2018+ F-series BMW B58 equipped vehicles will also have the OPF Version from the factory, please send us your VIN number to check the correct fitment. If you're in doubt, please do not hesitate to contact us.
- BMW 1-Serie F20 M140i - 2018-
- BMW 1-Serie F21 M140i - 2018-
- BMW 2-Serie F22 M240i - 2018-
- BMW 2-Serie F23 M240i - 2018-
- BMW 3-Serie F30 340i - 2018-
- BMW 3-Serie F31 340i - 2018-
- BMW 4-Serie F32 440i - 2018-
- BMW 4-Serie F33 440i - 2018-
- BMW 4-Serie F36 440i - 2018-
- BMW 5-Serie G30 540i - 2018-
- BMW 5-Serie G31 540i - 2018-
- BMW 6-Serie G32 640i - 2018-
- BMW 7-Serie G11 740i/Li - 2018-
- BMW 7-Serie G12 740i/Li - 2018-
NOT for vehicles with Exhaust emission standards EU6 rde II EXHAUST GAS TECHN. BHARAT STAGE VI RDE with dual OPF pressure sensor connection, see image below:
When in doubt, send us your VIN number to double check.

Note:
Certain products, such as exhaust components or tuning software, may alter or remove emissions systems. These parts are intended for off-road or motorsport use only and may not be legal for road use in your country. It is the buyer’s responsibility to ensure compliance with all local laws and regulations. Use at your own risk. These products are intended for off-road, race, or competition use only, and are not legal for use on public roads or vehicles registered for street use in the United States. It is the customer’s responsibility to ensure compliance with all local, state, and federal laws. Installation or use of these products on pollution-controlled vehicles may violate the U.S. Clean Air Act and could result in significant fines or penalties.
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DCE Parts - 5.2 Inch B58 Downpipe - F & G Chassis - BMW M140i, M240i, M340i, M440i, 540i, 640i, 745E, 840i, Z4, Supra & XDRIVE - (OPF & V-Band Flange Type)
Catless Heat Shield (Catless Dummy Cat)
€699,00 -
BMW - Genuine B58 Turbo Clamp - 18 32 8 612 537Clamp between turbo and downpipeIn stock
€30,50
-
Genuine BMW - B58 Turbo Gasket - 18328612538New turbo gasket prevents exhaust leaksIn stock
€21,00
-
BMW - Genuine B48 B58 Catback Downpipe Clamp - 18 30 5 A09 B63Clamp between downpipe and catbackOn order
€30,50
Not sure this set fits or is allowed for your car? Send us your VIN and we'll check it for you.
FITTED AND TUNED IN ONE VISIT
The downpipe needs a remap to run right. Let our workshop in Woerden fit the parts and tune your car.
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Emissions & road use
Catless, cat-delete and OPF/GPF-delete versions are intended for motorsport and off-road use only. Fitting them on a road-registered vehicle may not be permitted in your country and can affect type approval, inspections (MOT/APK/TÜV), warranty and insurance. Versions with a 200- or 300-cell high-flow catalytic converter keep a catalyst in place. Always check your local regulations before fitting. Catless and delete parts are not shipped to the United States.
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