ACL Race Series big end bearings for the S54B32 engine, as found in the E46 M3, late Z3 M and Z4 M. ACL bearings are a vital upgrade that increase the life and strength of your S54.

Combine with ARP connecting rod bolts for the perfect upgrade.

Why not add a bottle of Hack Engineering Engine Assembly Lubricant to protect your new bearings on first start up?

*Oversized options are for crankshafts that have been machined. Regular sized bearings are for non-machined crankshafts.