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.
Digital Download
Intelligent Octane Adaptations
