Audi 4.2L BHF Main Bearings (WPC Treated)

Standard (yellow) clearance.
Upper and lower halves sold as complete set for the crankshaft.
Genuine Audi Engine Crankshaft Lower Main Bearing 079-105-591-B-GLB
Genuine Audi Engine Crankshaft Upper Main Bearing 079-105-561-B-GLB

What is WPC?

WPC is a proven process that has been utilized for many years in the racing and automotive industry. WPC is not a coating, it is a treatment that enhances the surface to reduce friction and strengthen engine parts.

The WPC process is unrivalled in treating engine parts and other surfaces that have contact points of friction. WPC is superior because it is not a coating; it is a permanent surface treatment that reduces friction while strengthening the part. It's unique micro-dimple formation pattern greatly reduces friction and is unmatched by conventional methods of surface treatment.
WPC has the capacity to treat carburized, nitrided and plated parts without noticeable dimensional changes, and, upon completion of treatment, no further modifications are required of the parts.
The strength and durability improvement on the surface after the WPC treatment is unsurpassed by any current methods.Treatable products include steel, aluminum, titanium, copper and brass and soft surfaced bearings. WPC can treat any metallic item in a disassembled state.