Home » 513 HP Stage 2 ECU Software Power Package | BMW M240i/M340i/M440i/Z4M40i Generation 2 B58
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513 HP Stage 2 ECU Software Power Package | BMW M240i/M340i/M440i/Z4M40i Generation 2 B58

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$2,295.00
$2,295.00

Horsepower

Stock: 415 HP
Tuned: 513 HP*

Torque

Stock: 473 TQ
Tuned: 570 TQ*

*Performance gains measured on 100 Octane at the CarBahn San Jose, CA Dynamometer

Choose your installation method

Select how you would like your CarBahn software installed. Dealer installation is the fastest, easiest and most cost-effective option.

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Authorized CarBahn Dealer Installation

Your authorized CarBahn dealer has the tools and experience needed to unlock your DME and install the software as part of one straightforward service visit.

  • Fastest option
  • Easiest installation
  • Lowest overall cost
  • Professional support

A DME bench unlock is required. Your dealer handles the unlock locally as part of the installation and labor process. There is no need to ship your DME overseas.

Complete Your Installation

Select any optional upgrades you would like added to your order.

Selected add-ons will be added to your cart with the software. Warranty eligibility and coverage are subject to CarBahn’s warranty terms.

Find your nearest authorized CarBahn dealer

Not sure which option is right for your vehicle? Call 866-558-4314 ext. 1 and our team will help you choose the best installation path.

  • Digital Download
  • Top-Speed Governor Removed
  • Intelligent Octane Adaptations

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Vehicle Fitment & Product Details

  • Type: Tuning & Software
  • Vendor: CarBahn
  • Make: BMW
  • Model(s): M240i, M340i, M440i, M240i xDrive, M340i xDrive, and M440i xDrive
  • Vehicle Year(s): 2021, 2022, 2023, and 2024
  • Transmission(s): Automatic
  • Chassis: G20
  • Body Style(s): Sedan, Coupe, and Convertible
  • Drivetrain(s): xDrive and RWD
  • Fits Engines: B58
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Product Description

CarBahn Stage 2 Power Package — Gen 2 B58

Unlock the full potential of the Gen 2 B58 with a complete, matched combination of performance software, upgraded cooling, and improved airflow. The CarBahn Stage 2 Power Package includes:

  • CarBahn Stage 2 ECU Software
  • CarBahn High-Performance Heat Exchanger
  • FREE CarBahn B58 High-Flow Air Filters

Developed through extensive dyno testing, the Stage 2 calibration optimizes boost, ignition timing, fueling, and torque delivery to produce significantly more power while preserving the smooth, predictable drivability expected from a BMW.

On 93 octane, Stage 2 delivers an additional 74 horsepower and 73 lb-ft of torque at the flywheel. With 100-octane fuel, output climbs to an estimated 513 horsepower and 570 lb-ft of torque—gains of 98 horsepower and 97 lb-ft over stock.

Power That Stays Consistent

More boost creates more heat, and rising intake-air temperatures can cause the factory ECU to reduce ignition timing and power. The included high-performance heat exchanger helps control that heat so the engine can deliver stronger, more repeatable performance during sustained acceleration, mountain driving, hot-weather use, and repeated pulls.

Its motorsport-grade bar-and-plate core uses optimized end-tank geometry, increased thermal surface area, and F1-derived thermal-efficiency technology to improve heat rejection while maintaining coolant velocity and airflow efficiency. The result is lower, more stable intake-air temperatures with reduced heat soak, timing pull, and power fade. CarBahn rates this heat exchanger design for up to 40% greater cooling capacity than the factory system. Heat exchanger technical details

The included B58 high-flow air filters complement the software and cooling upgrades by improving airflow through the factory airboxes—at no additional cost with this package.

Performance Results

Fuel Configuration Flywheel Power Wheel Power
— OEM Stock 415 HP / 473 lb-ft 341 HP / 388 lb-ft
93 Octane Stage 2 489 HP / 546 lb-ft 401 HP / 448 lb-ft
100 Octane Stage 2 513 HP / 570 lb-ft 421 HP / 468 lb-ft

Gains Over Stock

  • 93 octane: +74 HP and +73 lb-ft at the flywheel
  • 93 octane: +60 WHP and +60 lb-ft at the wheels
  • 100 octane: +98 HP and +97 lb-ft at the flywheel
  • 100 octane: +80 WHP and +80 lb-ft at the wheels
  • Improved throttle response and midrange acceleration
  • Reduced heat soak and more consistent power under sustained load
  • Smooth, factory-like power delivery
  • Calibrations available for fuel up to 100 octane
  • FREE B58 high-flow air filters included

Power figures represent CarBahn test results under controlled conditions. Actual output may vary depending on vehicle condition, fuel quality, installed hardware, environmental conditions, and dyno type.