Supersprint BMW B58 Catless Decat Downpipe M140i, M240i, 340i, 440i, 540i, 740i, X3 M40i, X4 M40i | Track Use Only | Part 524211

Race front pipe for BMW B58 powertrain — Part 524211

Unlock your B58’s potential with Supersprint’s primary catalyst delete front section, engineered for serious circuit work only. Part 524211 replaces the restrictive factory converter with a free‑flow turbo outlet, reducing drive pressure, sharpening boost response and giving your tune more headroom for power. Expect a harder‑edged soundtrack and quicker transient response that transforms how your M140i, M240i, 340i, 440i, 540i, 740i, X3 M40i or X4 M40i pulls through the revs when paired with a suitable calibration.

We run this race front pipe on our own B58 builds and the feedback from our customers mirrors our experience: crisper throttle, stronger mid‑range, and the right track‑day tone. Fitment is straightforward, the finish is superb, and Supersprint’s motorsport pedigree shows the moment you press the starter.

Why this B58 turbo outlet upgrade works

• Primary cat removal for maximum flow from the turbine discharge
• Lower exhaust back pressure helps the turbo spool sooner and hold boost more efficiently
• Ideal foundation for Stage 2 mapping and supporting hardware
• Noticeably more aggressive exhaust character under load, with addictive turbo sounds on overrun
• Direct fitment with provision for the factory lambda sensor (threaded boss included)
• Track and competition use only

Important information

• May illuminate a check engine light without appropriate ECU calibration. A remap or software solution is recommended.
• For motorsport/closed‑course use only. Not legal for road use.
• For July 2019‑on OPF/GPF cars, use the dedicated Supersprint solution for particulate filter‑equipped models.

Vehicle applications

• BMW F20/F21 LCI M140i 340 hp (including xDrive and valve variants)
• BMW F22/F23 M240i 340 hp 2016–2017 (including xDrive and valve variants)
• BMW F22/F23 LCI M240i 340 hp 2017→ (including xDrive and valve variants)
• BMW F30/F31 LCI 340i 326 hp (including xDrive and valve variants)
• BMW F34 LCI 340i/340iX Gran Turismo 326 hp (including valve variants)
• BMW F32/F33/F36 LCI 440i/440iX 326 hp (including valve variants)
• BMW G30/G31/G38 540i/540i xDrive/540Li B58 340 hp
• BMW G32 GT 640i/640i xDrive B58 340 hp
• BMW G11/G12 740i/740Li/740LiX B58 326 hp
• BMW G01 X3 M40i xDrive B58 360 hp (including valve variants)
• BMW G02 X4 M40i xDrive B58 360 hp (including valve variants)

Part number

Supersprint 524211

Fitting and support

Professional installation available at MJ Modifications in Warwickshire. Request a quote: info@mjmodifications.co.uk. We’re happy to advise on compatibility, mapping strategy and supporting upgrades for your B58 track build.

Manufacturer and warranty

Manufacturer: Supersprint

Warranty: Supersprint 3‑year warranty

Search terms to help you find this item

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