Hack Engineering custom-specified Main Cap Bolt for BMW S50 and S54 engines (plus more – see below).

BMW discontinued these bolts in early 2021 leaving engine builders across the world with no option for a tried and tested replacement bolt.

We worked tirelessly with numerous fastener manufacturers to replicate the original BMW bolt’s clamping force and strength for repeatable and accurate main line bore roundness. These are now our in-house bolt option, which we have opted to make publicly available.

Replaces BMW part number 11112244286. As with all engine components, it is the responsibility of the fitter to perform all measurements to verify proper installation.

These main bolts are suitable for S50B30, S50B32, S54B32, M41, M47, M51 and M57 engines.

Fourteen required for six-cylinder engines, ten required for four-cylinder engines.