Main Bearing Set - Dart LS-Next Block

The Main Bearing Set - Dart LS-Next Block by King Bearings is engineered for builders and mechanics who demand precision in high-performance LS engine builds. This bearing set is purpose-built for the Dart LS-Next engine block platform, a popular choice in street, strip, and competition applications where reliability and clearance control directly impact longevity. The 0.001-inch undersize specification addresses critical oiling and clearance requirements in tight-tolerance builds where stock or standard clearances may compromise film strength or load capacity.

King Bearings Main Bearing Set features extra oil clearance geometry designed to optimize hydrodynamic film formation under sustained boost, high RPM, or elevated cylinder pressures common in turbocharged or supercharged LS-series applications. The XP material formulation delivers enhanced load-carrying capacity and thermal stability, reducing bearing wear during peak horsepower events and extended heat cycles. The 0.001-inch undersize dimension requires precision honing and clearance verification during assembly, ensuring proper oil flow through main galley passages while maintaining adequate load support across the crankshaft span.

This bearing set is ideal for engine builders, performance shops, and dedicated enthusiasts rebuilding a Dart LS-Next block destined for forced induction, track use, or high-boost street applications. Proper installation requires a torque wrench, micrometer, and Plastigage clearance verification to confirm specification compliance; oversized or undersized clearances will compromise oil delivery and bearing life. The set weight of 1.35 lbs reflects the complete main bearing package, and compatibility is specific to Dart LS-Next architecture—verify your block casting before ordering to avoid fitment issues.