Description
Upgrade your 2020 BMW's B58-powered performance with CarBahn Performance 477 HP Stage 1 ECU Software. Designed for select BMW M340i, 540i, 740i, 840i, and Z4 M40i models, this Stage 1 calibration increases both horsepower and torque while supporting the supplied rear-wheel-drive and xDrive applications.
On 93 octane fuel, the CarBahn Stage 1 calibration increases calculated flywheel output from the factory 420 HP and 463 lb-ft of torque to 477 HP and 516 lb-ft of torque. Measured wheel output increases from 345 WHP and 380 WTQ to 391 WHP and 423 WTQ.
An optional exhaust overrun feature is also available for enhanced exhaust character.
Installation: Dealer Install Only.
Performance Specifications
Calculated Flywheel Power
- OEM Stock: 420 HP / 463 lb-ft TQ
- Tuned 93 Octane: 477 HP / 516 lb-ft TQ
- Flywheel Gain: +57 HP / +53 lb-ft TQ
Measured Wheel Power
- OEM Stock: 345 WHP / 380 WTQ
- Tuned 93 Octane: 391 WHP / 423 WTQ
- Wheel Gain: +46 WHP / +43 WTQ
Key Features
- CarBahn Performance Stage 1 ECU Software
- Up to 477 HP and 516 lb-ft of flywheel torque on 93 octane
- Up to 391 WHP and 423 WTQ at the wheels
- +57 HP and +53 lb-ft TQ at the flywheel
- +46 WHP and +43 WTQ at the wheels
- Optional exhaust overrun feature
- Supports supplied xDrive and RWD applications
- Dealer installation required
Detailed Fitment
- Make: BMW
- Models: Z4 M40i, M340i, M340i xDrive, 540i, 540i xDrive, 740i, 740i xDrive, 840i, and 840i xDrive
- Vehicle Year: 2020
- Transmission: Automatic
- Chassis: G20, G29, G30, G15, G16, and G11
- Body Styles: Sedan and Convertible
- Drivetrains: xDrive and RWD
- Part Number: CBB58-0101
- Installation: Dealer Install Only
Product Information
- Type: Tuning & Software
- Vendor: CarBahn
- Application: Stage 1 ECU Performance Software
- Fuel: 93 Octane
- Engine Family: BMW B58
- Installation: Authorized Dealer Required
