BMW M140i F20/F21 B58 Mid Pipe Centre Section - Resonator/Res Delete, Middle Box Delete, GPF/PPF Delete - Non-Resonated Straight Pipe (Cat to Back Box) 3" 76mm Performance Exhaust Upgrade - Cobra Sport

BMW M140i centre section upgrade for F20 and F21 B58 models. Transform the soundtrack of your 3.0 straight-six with this non-resonated mid-pipe and particulate filter removal tube. Designed to fit from the catalytic converter area to just before the rear silencer, this direct-replacement middle section unleashes a deeper, sportier tone and sharper throttle response feel while improving exhaust gas flow.

Compatible with both earlier pre-particulate filter cars and later vehicles fitted with a petrol particulate filter. On pre-PPF cars it replaces the factory centre silencers for a true res delete. On PPF-equipped cars it substitutes the GPF unit for a free-flowing straight-through section. A calibration is required on PPF-equipped cars to prevent an engine management light. Installation on PPF-equipped vehicles is for motorsport and off-road use only.

Why enthusiasts choose this M140i mid-pipe

• 3 inch 76.2 mm mandrel-bent pipework for reduced restriction and improved flow
• Precision TIG-welded hangers and a direct-fit design that mates to the OEM back box
• Noticeably richer exhaust note with a deeper tone under load and characterful overrun burbles, pops and bangs
• Measured sound increase of approximately 7.5 percent dB for an authentic straight-six soundtrack
• Supplied with the required fittings and gaskets so you can install and revert to stock if desired

Fitment and compatibility

Made specifically for the BMW M140i 3.0 turbo B58 engine in the F20 and F21 chassis. Fits from the cat section to before the rear box, replacing the full centre section. Works on both early non-PPF cars and later PPF cars.

Important If your M140i has a petrol particulate filter you must have a basic ECU reflash at the time of installation to cancel the EML. Fitment to PPF-equipped models is strictly for track and off-road use.

Sound and driving character

This straight-through middle section frees the B58 to deliver a bassier, more engaging note without the stock muffling. Under throttle the car gains a vibrant, motorsport-inspired tone, while on lift-off you will hear a purposeful burble with audible crackles. It is the most cost-effective way to transform the acoustics of a stock M140i without changing the rear muffler.

Build quality

Developed by Cobra Sport using high-quality 3 inch mandrel bends and TIG-welded brackets for excellent alignment and long-term durability. The fit and finish set it apart from generic alternatives.

What’s in the box

• Centre section delete pipe for BMW M140i
• Relevant clamps, fittings and gaskets
• Instructions for a straightforward installation and easy return to standard if required

Fitting service

Want it installed by specialists who know these cars inside out? Book professional fitting with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote and availability.

Customer feedback

Our M140i clients consistently report a more exciting drive, a stronger exhaust presence and excellent fitment. We run this setup in-house and love the result.

Usage notes

• PPF removal on vehicles equipped with a particulate filter is for motorsport and off-road use only
• Basic ECU reflash required on PPF cars to prevent warning lights

Also searched as

BMW M140i centre pipe, M140i mid pipe, M140i resonator delete, M140i middle box delete, M140i GPF delete, M140i PPF delete, F20 F21 M140i exhaust upgrade, B58 mid-section, cat to back box straight pipe, non-resonated centre section.

Media

Listen to before and after sound examples and see a typical installation below.