487 HP Stage 1 Performance Controller | BMW M240i/M340i/M440i

Performance Gains

CarBahn Performance Controller (CPC):

The CarBahn Performance Controller (CPC) is a plug-and-play ECU that increases boost pressure in turbocharged vehicles, delivering significant horsepower and torque gains. The unit features selectable maps via a Bluetooth app, allowing you to optimize performance based on fuel octane levels. The app is available for download on both iOS and Android:

• Apple App Store
• Google Play Store

These maps support 91, 93, and 100 octane fuels, enabling additional performance enhancements. As with all CarBahn products, an optional powertrain warranty is available for purchase.

If you choose to upgrade to CarBahn Software in the future, you can trade in your CPC for a $250 upgrade credit. If you purchased the warranty, it will transfer to the software at no additional charge.

Emissions Legality

A note on downpipes (removing the catalyst): Our testing has shown that removing the catalytic converter results in only an 11HP gain, significantly less than many claim. Additionally, removing the catalyst makes it difficult to pass emissions tests and is illegal. We encourage keeping emissions systems intact to support cleaner air.

About Steve Dinan:
Steve Dinan has over 40 years of experience in streetcar tuning. As an engine supplier, his expertise has contributed to three prototype racing championships and two overall wins at the 24 Hours of Daytona with Chip Ganassi Racing. No one knows more about tuning high-performance engines than Steve Dinan.