King Bearings MB556XPNSTDX Main Bearings - BB Chevy, +.001 Extra Clearance

What makes King Engine Bearings track tough and street smart? King XP specifically engineered to withstand the highest loads and RPMs generated by today's top competition engines. All King Performance Engine Bearings feature, Bulls Eye Tolerance: King engine bearings have the closest wall tolerances in the industry, with all shells matched to 0.0001". Increased Height: Greater rod bearing height improves bearing-to-bore contact/heat transfer and reduces spin potential at high RPM. Improved Oiling: Mains feature enlarged, chamfered oil holes. Medium Eccentricity: This enables optimum load distribution and improved oiling. Narrowed Design: Mains and rods are narrowed for large-radius crankshafts. Enhanced tri-metal copper lead construction with nickel barrier and Secure Bond adhesion.