Stage 1 B58 High Performance Engine (B30B AWD) M240i xDrive/M340i xDrive/M440i xDrive/X3 M40i/X4 M40i

he CarBahn ST1 S58 engine is rated for up to 750 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 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. Steve Dinan's engine shop, with 46 years of experience, has built engines that have won many championships, including three prototype racing championships and two overall wins in the 24 Hours of Daytona (2011-2013). You won’t find a higher-quality engine from any other BMW tuning company. All engines come with a two-year warranty.

Experience top-tier S58 engine tuning with CarBahn.

The CarBahn engine is both stronger and less expensive than the BMW OEM factory engine. 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 high performance valve springs for increased boost. The engine is a complete overhaul with blue printing and balancing. This engine is designed for an increase in torque of 50% over stock.

Steve Dinan’s engine shop has been building racing engines for 43 years. Those engines have won many championships including three prototype racing championships including 2 overall wins in the 24hrs of Daytona in 2011-2013. You will not find a higher quality engine. All engines are backed with a two-year warranty.

Engine core acceptance parameters

Must be complete core (factory engine, from oil pan to valve cover)

• Block must have no:
  • Holes or cracks in casting
  • Holes or crack in covers
  • Bore damage that cannot be honed out
  • Thrust surface damage
  • Journal surfaces damage
  • Bolt hole damage that can’t be repaired
• Heads must have no:
  • Holes or cracks in casting
  • Holes or crack in covers
  • Thrust surface damage
  • Journal surfaces damage
  • Bolt hole damage that can’t be repaired
• Additional repair charges could apply 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