Kies Motorsports Crank Bolt Lock, BMW N54/N55/S55 M40iX The Pro-Xtreme design from CP-Carrillo

The Pro-Xtreme design from CP-Carrillo ensures that these connecting rods can handle the intense stress produced by high-boost turbo applications and racing conditions

Surface Rejuvenation: The block surface is meticulously refinished to the pinnacle of precision

5 mm bore size yields a displacement of 3342 cc

They also offer crucial protection against sudden engine failure

Supports distributor

Kies Motorsports Crank Bolt Lock, BMW N54/N55/S55 M40iX The Pro-Xtreme design from CP-CarrilloThe Kies Motorsports Crank Bolt Lock acts to "lock" the crank bolt on the S55, N55, and N54 in an effort to prevent the crank bolt from backing out, which can lead to catastrophic engine failure. By locking the bolt into place, you virtually eliminate the possibility of the crank bolt working its way loose. Please note, by adding the Kies Crank Bolt Lock, it is still possible to spin a crank hub, however, it lessens the risk of the hub spinning