S65 4.1L Blower Rebuild Kit

Part Number: CB065-6002 Category:


The CarBahn Autoworks S65 4.1L bored engine is built features high performance over-sized forged pistons, a resized crankshaft with stock stroke, and high-strength forged Carrillo connecting rods and CarBahn / Clevite racing rod bearings. The bore is increased to 92.5 mm.


To facilitate more boost, the engine has been re-engineered to be a forced induction engine with lower compression, more crown height to dissipate heat, thicker rings, and stronger connecting rods. The kit can be purchased in 3 compression ratios: 10:0-1, 10.5-1, and 11:0-1.

CarBahn high performance valve springs are sold separately and provide significant improvements in durability.

Additional Information


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.


  • 2008-2011 BMW M3 Base Sedan
  • 2008-2013 BMW M3 Base Coupe
  • 2008-2013 BMW M3 Base Convertible


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