Genuine BMW MPPSK B58 M Performance Power & Sound Kit - F30 F31 F34 3 Series 340i, F32 F33 F36 4 Series 440i (incl xDrive) | OEM Valved Exhaust + Software | +35hp 355hp, 369 lb-ft | PN 11122444531

Official BMW B58 Power Pack for 340i and 440i - Valve-Controlled Exhaust with ECU Calibration

Give your 3 Series or 4 Series the factory performance it deserves with BMW’s own power pack for the B58. This dealer-approved upgrade blends a switchable, valve-controlled sports exhaust with a BMW software calibration for a sharper, more responsive drive and a deeper, richer soundtrack that integrates with your driving modes.

Proven gains of plus 35 bhp to 355 bhp with up to 369 lb ft on automatic models and up to 355 lb ft on manual cars. The exhaust flap is managed via Driving Experience Control, so Comfort stays refined for daily use while Sport and Sport Plus unlock a fuller, more aggressive tone. It is a complete, original-equipment solution engineered by BMW for perfect fit, factory reliability and seamless drivability.

We have fitted and used this package at MJ Modifications and our customers consistently praise the stronger mid-range pull, improved throttle response and the addictive note from the BMW performance silencer. If you want OEM-plus power, sound and quality without compromise, this is the upgrade.

Key benefits

• BMW original-equipment performance package for B58-powered 340i and 440i
• Uplift to 355 bhp with up to 369 lb ft on autos, 355 lb ft on manuals
• Valve-operated rear silencer for quiet cruising and enhanced tone in Sport modes
• Fully integrated ECU calibration for smooth power delivery and factory refinement
• Designed for precise fitment on F30, F31, F34 3 Series and F32, F33, F36 4 Series, including xDrive

Note: Tailpipe finishers are not included and can be added separately.

What you receive

• BMW performance rear muffler with valve control
• Software upgrade activation code
• Wiring harness
• M Performance decal kit
• Label and badge

Vehicle compatibility

B58 applications

• 3 Series
  • F30 LCI 10/2014 to 10/2018 340i and 340ix
  • F31 LCI 10/2014 to 06/2019 340i and 340ix
  • F34 GT LCI 09/2015 to 12/2019 340i and 340ix
• 4 Series
  • F32 2013 to 02/2017 440i and 440ix
  • F32 LCI 05/2016 to 12/2019 440i and 440ix
  • F33 03/2015 to 02/2017 440i and 440ix
  • F33 LCI 05/2016 to 12/2019 440i and 440ix
  • F36 Gran Coupé 03/2015 to 02/2017 440i and 440ix
  • F36 Gran Coupé LCI 05/2016 to 12/2019 440i and 440ix

Not sure if this suits your chassis, transmission or xDrive model? Email us with your VIN and we will confirm compatibility quickly.

Installation and support

Professional fitting is recommended. MJ Modifications offer supply and installation at our Warwickshire workshop. Request a quote at info@mjmodifications.co.uk and include your VIN for verification.

Part number

11122444531

Manufacturer

BMW

Warranty

Two years manufacturer warranty for UK customers and one year for international customers when a compatible VIN is provided at checkout.

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Order the BMW power pack today and transform your 340i or 440i with authentic performance, a premium soundtrack and the confidence of genuine parts.