CB055-6011 – S55 Engine with Forged Internals

Part Number: CB055-6011 Category:


Incudes, Forged Rods, Forged Pistons, Pined crankshaft, Full circle main bearing, labor and machine work to install them into the block.

*Note – Core charge may apply. Contact us for details.

Additional Information

This Short block Incudes: Forged Carrillo Rods, Forged CP Pistons, CarBahn Pined crankshaft, Full circle main bearing, labor and machine work to install them into the block.

This engine is the lower end only. This engine is for owners who have low mileage cars that have not had an engine failure and do not need a complete overhaul but just want a stronger engine for higher power applications. It is designed to make the S55 engine strong enough to handle high boost applications.

If you are planning a large power increase with bigger turbo’s CarBahn has designed a high-performance engine to handle very high outputs by pinning the cam sprocket to the crankshaft. To ensure durability we also machine the block to accommodate a full circle thrust main.

The stock high compression ratio is high for CAFÉ. (Corporate average fuel economy). However, this increased compression limits engine performance with higher boost setting by decreasing the size of the fuel air charge in the combustion chamber and by forcing the ignition timing to retard far below MBT (mean best timing). The CarBahn engine has .5 less compression to optimize the engine for the increased boost.

CarBahn History

Steve Dinan 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.


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