Stage 1 B58 High Performance Engine (B30C AWD) | BMW 540i xDrive/740i xDrive/745e xDrive/840i xDrive/X5 xDrive40i/X6 xDrive40i/X7 xDrive40i

The CarBahn B58 Stage 1 engine is rated for up to 650 lb-ft of torque. It is designed to improve durability for medium-output tunes, making it an excellent alternative to an OEM factory remanufactured engine, especially if your original engine has failed and is no longer under warranty. We use high-quality racing components, including Carrillo connecting rods, forged CP pistons, high-performance valve springs, and a high-performance head gasket.

This engine maintains the stock compression ratio, ensuring excellent drivability and fuel economy. 

The stock engine compression ratio is relatively high due to the Corporate Average Fuel Economy (CAFE) standards which push for consistently higher fuel economy in cars and trucks. However, this increased compression limits engine performance with higher boost settings by decreasing the size of the fuel-air charge in the combustion chamber, forcing the ignition timing to retard far below MBT (mean best timing, the theoretical optimal ignition timing). Therefore, the Carbahn B58 engine has 0.5 less compression to optimize the engine for the increased boost. 

The B58 CarBahn engine is designed to improve the strength of your engine if you are tuning your car. Connecting rods are replaced with Carrillo forged racing rods. Pistons are CP forged racing pistons. The engine also comes with lowered compression, ported cylinder head and high-performance valve springs for ultra-high boost pressures. The engine is a complete overhaul with blue printing and balancing. This engine is designed for an increase in torque of 100% over stock.