B58 Engine - xDrive, AWD | | 340i xDrive, 440i xDrive, 540i xDrive, 640i xDrive, 740i xDrive, 740e xDrive, M240i xDrive, X3 M40i, X4 M40i
The CarBahn B58 engine is designed to boost the strength and performance of your BMW engine, particularly for tuning applications. Rated for up to a 50% increase in torque over stock, this engine upgrade features Carrillo forged racing rods, CP forged racing pistons, and high-performance valve springs to handle higher boost levels. The engine also undergoes blueprinting and balancing to ensure optimal performance and reliability.
CarBahn's B58 performance engine offers a stronger and more affordable alternative to the BMW OEM factory engine, providing exceptional durability for high-performance tunes. Backed by Steve Dinan’s 46 years of experience in building championship-winning racing engines, including multiple victories at the 24 Hours of Daytona, this engine is engineered for maximum reliability and power. The CarBahn BMW B58 engine tuning is both stronger and more affordable than the BMW OEM factory engine.
All CarBahn engines are backed by a two-year warranty and are built to the highest standards. To ensure the best quality, the core must be a complete factory engine (from oil pan to valve cover) and meet specific acceptance criteria.
Designed to be both stronger and more cost-effective than the BMW OEM factory engine, the CarBahn B58 Engine benefits from Steve Dinan's 46 years of race engine-building expertise. His engines have powered multiple championship-winning cars, including three prototype racing titles and two overall victories at the 24 Hours of Daytona (2011-2013).
Choose CarBahn for superior B58 engine tuning.
Engine Core Acceptance Parameters
Must be complete core (factory engine, from oil pan to valve cover)
Block Requirements
- No holes or cracks in casting
- No holes or crack in covers
- No bore damage that cannot be honed out
- No thrust surface damage
- No journal surfaces damage
- No bolt hole damage that can’t be repaired
Head Requirements
- No holes or cracks in casting
- No holes or crack in covers
- No thrust surface damage
- No journal surfaces damage
- No bolt hole damage that can’t be repaired
Possible Additional Repair Charges
For damaged items that are not normally changed during an overhaul and cannot be repaired or serviced:
- Valves
- Crankshafts
- Camshafts
- Guides
- ValveTronic mechanism
- Vanos mechanism
Engine Warranty & Additional Information
Our engines are very strong and can often be very reliable even at power levels above what is recommended. The durability usually depends on the quality and the reliability of the tune and other aftermarket components added to the engine management system.
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Engines with CarBahn Software Tunes
All engines listed with a stage number (ex. Stage 1 & Stage 2) are designed to be road car engines and are covered for 2 years, 24,000 miles providing they have a CarBahn tune and there are no other parts on the car that have caused a premature failure. -
Engines with Another Company's Tune
All engines listed with a stage number (ex. Stage 1 & Stage 2) are designed to be road car engines and are covered are covered for 2 year, 24,000 miles providing they you stay under our recommended torque limits. Torque limits are indicated on the product listing. Warranty does not cover failures from the tune or aftermarket fuel injection components that caused the failure. It is CarBahn's full discretion to determine cause of failure. If Torque limit is exceeded, the warranty is for materials and workmanship only. -
Racing Engines
Racing engines are designed to be raced and are covered for materials and workmanship only. Racing engines should be rebuilt periodically based on run time or mileage. Warranty does not cover failures from the tune or aftermarket fuel injection components that caused the failure. It is CarBahn full discretion to determine cause of failure.