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704HP Stage 2 Performance Controller Power Package | BMW G8X M3/M4

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Part Number: CBG8X-9215 Base Stainless
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$6,480.00
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Set up your controller the way that works for you.

Starting at $6,480.00
Dealer installation labor is not included in this total.
ESTIMATED INSTALLATION TIME
1.5 hours

Typical labor time for this product.

Need professional installation?

Find an authorized CarBahn dealer to arrange installation and request a labor quote.

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Questions before you order? Our performance specialists can help.
(866) 558-4314

Performance Controller FAQs

Answers to common questions about installation, upgrades, tuning and warranty coverage.

Do I need an ECU unlock for a Performance Controller?

No. CarBahn Performance Controllers are plug-and-play devices that work with your vehicle's factory ECU without requiring an ECU unlock or software flash. You can install the controller at home or through a professional installer.

Why is a heat exchanger required for Stage 2?

Stage 2 produces additional power and heat, placing greater demands on the charge-air cooling system. The CarBahn Heat Exchanger provides increased cooling capacity to help control intake temperatures and maintain consistent performance.

The required CarBahn Heat Exchanger must be installed to achieve advertised Stage 2 performance and qualify for CarBahn's optional Factory Matching Warranty.

Can I upgrade to ECU reflash software later?

Yes. If you decide to move from a Performance Controller to CarBahn ECU Software, contact our tuning team to arrange the upgrade.

CarBahn offers a $250 controller trade-in credit toward eligible ECU Software purchases. Unlike the controller, ECU Software requires an ECU unlock and a compatible installation process. Your CarBahn dealer can help coordinate the conversion.

Does the warranty cover my powertrain if I install the controller myself?

CarBahn offers an optional Factory Matching Warranty for eligible vehicles and Performance Controller configurations. This provides separate coverage for qualifying powertrain repairs under CarBahn's warranty terms.

Self-installation does not automatically establish or exclude coverage. Your vehicle, installation, required supporting hardware and warranty purchase must satisfy the applicable terms and eligibility requirements.

We recommend confirming your eligibility with our team before installation, particularly if you plan to install the controller yourself.

How do I pair my Performance Controller with the app?

Download the Tuning Pro app and locate the 13-digit serial number on your controller or product cover sheet. Turn on your vehicle's ignition without starting the engine, enable Bluetooth, and disconnect other Bluetooth devices during initial pairing.

Open the app, enter the 13-digit serial number, and use the final six digits as the Bluetooth PIN when prompted. Once connected, select the map appropriate for the fuel in your tank.

View the complete pairing guide

What fuel octane levels are supported?

CarBahn Performance Controllers support selectable calibrations for 91, 93 and 100 octane fuel. Choose the appropriate map through the Tuning Pro app based on the fuel currently in your tank.

Higher-octane maps must only be used with the corresponding fuel. Available power output varies by vehicle and selected calibration.

Can I upgrade from Stage 1 to Stage 2 remotely, or do I need a new controller?

You don't need to purchase an entirely new controller. CarBahn supports remote upgrades from Stage 1 to Stage 2 on eligible Performance Controllers, so the existing unit can be updated without removal.

Stage 2 supporting hardware, including the required CarBahn Heat Exchanger, must be installed before operating the upgraded calibration. Contact our tuning team to confirm your configuration and arrange the upgrade.

Vehicle Fitment & Product Details

  • Type: Tuning & Software
  • Vendor: CarBahn
  • Make: BMW
  • Model(s): M3 and M4
  • Vehicle Year(s): 2021, 2022, 2023, and 2024
  • Transmission(s): Manual and Automatic
  • Chassis: G80 and G82
  • Body Style(s): Coupe and Sedan
  • Drivetrain(s): RWD and xDrive
  • Measured Flywheel Horsepower: 602
  • Part Number: CBG8X-9215, CBG8X-9215W
  • Installation Time (hrs): 2
View full details
Fuel Power Type Configuration Power
93 Octane Calculated Flywheel Power OEM Stock 515HP / 462TQ
Tuned 565HP / 503TQ
Measured Wheel Power OEM Stock 453HP / 407TQ
Tuned 497HP / 443TQ
100 Octane Calculated Flywheel Power Tuned 602HP / 540TQ
Measured Wheel Power Tuned 530HP / 475TQ

 

The CarBahn Performance Controller (CPC) is an easy-to-install electronic control unit (ECU) that significantly boosts the turbocharged cars' horsepower and torque. This plug-and-play unit offers selectable maps, which can be accessed through a smartphone application via Bluetooth.

 

To access this app, you can download them from either the Apple App Store or the Google Play Store.

   

 

These maps are specifically designed to optimize performance based on different octane fuel levels. You have the flexibility to choose between 91, 93, and 100 octane options.

 

CarBahn has successfully engineered and manufactured the industry’s largest and most thermally efficient Heat Exchanger. By employing innovative design techniques, CarBahn has achieved a remarkable 40% increase in cooling capacity compared to existing Heat Exchangers in the market. Drawing inspiration from Formula 1 Heat Exchanger technology, CarBahn has integrated high-performance features and optimized flow dynamics to ensure unparalleled heat transfer efficiency. In addition to its superior thermal performance, CarBahn's race inspired design boasts a remarkable reduction in weight, thanks to the implementation of advanced lightweight materials and improved structural design.

 

Additionally, CarBahn offers an optional powertrain warranty for all their products, including the CPC.

 

If you wish to switch from the CarBahn Performance Controller to software in the future, there is an upgrade fee of $250. However, if you have purchased a warranty, it can be transferred to the software upgrade at no additional charge!!

 

Emissions Legality:

Let us address the topic of removing the catalyst, commonly achieved through the utilization of downpipes. Our rigorous testing regimen involved conducting consecutive dyno runs with and without the catalyst, and the observed power gain was significantly smaller than commonly touted, typically around 2%. Nevertheless, it is important to acknowledge our shared responsibility towards environmental preservation, as clean air is vital to our well-being. Furthermore, obtaining the necessary emissions certifications without a catalyst is a daunting task and, from a legal standpoint, it is considered an infringement.

 

About Steve Dinan:

With an illustrious career spanning over four decades, Steve Dinan stands as an authority in streetcar turbo tuning. Under his leadership, our team has triumphed in three prototype racing championships and secured two overall victories at the esteemed 24 Hours of Daytona in collaboration with Chip Ganassi Racing. Steve Dinan's unparalleled expertise solidifies our claim as the leading force in tuning high-performance engines.

 

Warranty Information:

Click here for all queries related to CarBahn Warranty.