Supersprint BMW B58 Sports Cat Downpipe 100 CPSI WRC
Unlock flow, sound and reliability with the Supersprint BMW B58 sports cat downpipe 100 CPSI WRC. This direct fit, plug and play, high flow catted downpipe replaces the restrictive factory catalyst on BMW B58 models including M240i, 340i, 440i, 540i, 740i, X3 M40i and X4 M40i. Designed by Supersprint for maximum efficiency, it retains factory mounting points, heat shield locations and O2 or lambda sensor positions for a true OEM-style installation with no cutting or welding.
Featuring a generous volume, 100 CPSI metallic honeycomb catalyst with a high loading of noble metals, this B58 sports cat downpipe is built to flow. The premium catalyst core helps avoid CEL or warning lights, irregular emissions behaviour, unpleasant smells and issues sometimes seen with cheaper cats. A top-tier flex joint provides excellent durability while allowing the engine to move freely, improving longevity and fitment integrity.
We have fitted and used Supersprint B58 downpipes on customer cars and our own builds, and the results have been superb. Expect faster turbo response, a stronger midrange and a more purposeful exhaust note when combined with a suitable tune or remap. This part is the key performance component in the Supersprint B58 exhaust system and is ideal for stage 1 and stage 2 tuning plans.
Why choose the Supersprint B58 100 CPSI sports cat downpipe
- Direct fit, plug and play replacement for the OEM B58 downpipe
- High flow 100 CPSI metallic sports catalyst with high noble metal content
- Optimised shape and generous volume for maximum exhaust gas flow
- Designed to help avoid CEL and odour issues common with low grade cats
- Premium flex joint for durability and correct engine movement
- Factory-position O2 or lambda sensor threaded bung included
- Perfect foundation for remapped and tuned BMW B58 engines
- Supersprint quality, fit and finish
Fitting and support
Professional installation recommended. For fitting, contact Nforcd in Warwickshire for a quote at Sales@nforcd.com. Our team has hands-on experience with the BMW B58 platform and Supersprint hardware, and our customers consistently report excellent fitment and results.
Compatibility – BMW B58 models
- BMW 2 Series F22 LCI M240i
- BMW 2 Series F22 LCI M240i with valve
- BMW 2 Series F22 LCI M240i xDrive
- BMW 2 Series F22 LCI M240i xDrive with valve
- BMW 2 Series F23 M240i
- BMW 2 Series F23 LCI M240i
- BMW 2 Series F23 LCI M240i with valve
- BMW 2 Series F23 LCI M240i xDrive
- BMW 2 Series F23 LCI M240i xDrive with valve
- BMW 3 Series F30 / F31 LCI 340i
- BMW 3 Series F30 / F31 LCI 340i with valve
- BMW 3 Series F30 / F31 LCI 340i xDrive
- BMW 3 Series F30 / F31 LCI 340i xDrive with valve
- BMW 3 Series F34 LCI 340i
- BMW 3 Series F34 340i with valve
- BMW 3 Series F34 340i xDrive
- BMW 3 Series F34 340i xDrive with valve
- BMW 4 Series F32 / F33 / F36 LCI 440i
- BMW 4 Series F32 / F33 / F36 LCI 440i with valve
- BMW 4 Series F32 / F33 / F36 LCI 440i xDrive
- BMW 4 Series F32 / F33 / F36 LCI 440i xDrive with valve
- BMW 5 Series G30 540i
- BMW 5 Series G30 540i xDrive
- BMW 5 Series G31 Touring 540i xDrive
- BMW 5 Series G38 540Li
- BMW 6 Series G32 GT 640i
- BMW 6 Series G32 GT 640i xDrive
- BMW 7 Series G11 740i
- BMW 7 Series G12 740Li
- BMW 7 Series G12 740LiX
- BMW X Series G01 X3 M40i xDrive
- BMW X Series G01 X3 M40i xDrive with valve
- BMW X Series G02 X4 M40i
- BMW X Series G02 X4 M40i xDrive with valve
Part number
Supersprint 524221
Manufacturer and warranty
Manufactured by Supersprint
Supersprint one year warranty
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