Stage 2 S58 High Performance Engine | BMW F9X X3M/X4M

The CarBahn B30A S58 Stage 2 engine is rated for up to 850 lb-ft of torque. It is designed to improve durability for high-output tunes, making it a great alternative to an OEM factory remanufactured engine, especially if your original engine has failed and is no longer under warranty. Please note, the engine itself is not covered under warranty. We utilize high-quality racing components, including Carrillo connecting rods, forged CP pistons, high-performance valve springs, a high-performance head gasket, and cylinder head studs. The CarBahn S58 engine is both stronger and more affordable than the BMW OEM factory engine, making it the ideal choice for BMW S58 performance enthusiasts.

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 S58 engine has 0.5 less compression to optimize the engine for the increased boost. 

The CarBahn engine is both stronger and less expensive than the BMW OEM factory engine. The S58 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 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.