N55 Stage 1 High Performance Engine

The CarBahn ST1 N55 engine is rated for up to 550 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. We use high-quality racing components, including Carrillo connecting rods, forged CP pistons, high-performance valve springs, and a high-performance head gasket. The crankshaft is secured with CarBahn's dual pin system to ensure perfect timing, and the engine is machined to accept a full-circle thrust main bearing.

The CarBahn N55 engine is both stronger and more affordable than the BMW OEM factory engine, making it the ideal choice for BMW N55 performance enthusiasts. Steve Dinan's engine shop, with 46 years of experience, has built engines that have won numerous 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 the power and performance of N55 engine tuning with CarBahn.

The N55 engine tuning is not designed to take a large increase in boost beyond the OEM spec. Due to the design of the crankshaft, it is known to have the timing chain sprocket spin on the end of the crankshaft, causing the cams to go out of time. In extreme cases, the valves can hit the pistons, causing catastrophic damage. Furthermore, the N55 only has half of a normal crankshaft thrust bearing. To ensure durability we pin the timing chain sprocket to the crankshaft, machine the block to accommodate a full circle thrust main. All engines are backed with a two-year warranty.

CarBahn History

Steve Dinan's engine shop has been building high performance and racing engines for BMW s since 1977, winning 12 racing championships including 3 prototype championships and two 24 Hours of Daytona. The same engine shop that builds the racing engines also builds the street car engines; these talented engineers, machinists, and builders have built hundreds of engines from OEM street rebuilds to full-blown racing engines.