ACL Race Big End Bearings (M20/M50/M52/M54)
ACL Race Series big end bearings for the M20, M50, M52 and M54 engines, as found in many 3 Series, 5 Series, Z3/Z4 etc. ACL bearings are a vital upgrade that increase the life and strength of your engine.
Choose from OE size, +.025, or HX series for an extra .001″ oil clearance. Oversizes available by request. 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?