ACL Bearings 4M8147-STD Standard Main Bearing Set

The ACL Bearings 4M8147-STD is a standard size main bearing set engineered for Mazda V6 K8 and KL series engines (1.8L to 2.5L displacement, 1992-1998 models). This precision-manufactured bearing set provides reliable protection for your crankshaft journals during engine rebuilds and performance upgrades.

Key Features:

• Standard size (STD) main bearing set for OEM crankshaft specifications
• Tri-metal construction featuring hardened steel backing for superior strength and durability
• Advanced metallurgy and engineering designed for demanding applications
• Precision-manufactured to exact tolerances for optimal oil clearance
• Compatible with Mazda K8 and KL V6 engines (1844cc-2497cc)
• Direct OEM replacement bearing set

ACL Bearings are recognized throughout the automotive industry for their quality and performance. These main bearings feature tri-metal construction with a hardened steel back, copper-lead intermediate layer, and overlay surface for excellent wear resistance and load capacity. The standard size design is intended for use with factory specification crankshaft journals that have not been machined undersize.

Proper installation requires cleaning all components thoroughly, checking oil clearances with plastigage, and torquing main caps to manufacturer specifications. Always verify bearing clearances before final assembly.