King MB 509XPC SBC w/400 Mains XP Series pMaxBlack Coated STD Main Bearings

King Bearings Tri-metal, enhanced copper lead bearings have nickel barrier plating to withstand high loads and extreme RPM. Multi-layer adhesion process improves stability between top and intermediate layers. Large, chamfered oil holes, 1/2 grooving, and a narrow design make Xtreme main bearings compatible with large radii crankshafts.

Features the pMaxBlack™ overlay that increases hardness and topped by the innovative pMaxKote™ ceramic nano-composite polymer coating, that enhances wear & seizure resistance without altering the bearing’s original wall thickness dimensions.

• Small Block Chevy 400 Mains Bearing Set
• Mains are 1/2 grooved for uncompromised lower shell load capacity
• Standard Crank Size
• pMaxBlack™ ceramic nano-composite polymer coating
• Tri-metal copper-lead nickel