XP Main Bearing Set Dart LS-next Block

The XP Main Bearing Set Dart LS-next Block by King Bearings is engineered for builders and mechanics who demand precision-grade engine internals for high-performance LS platform builds. This main bearing set serves as the critical foundation of any LS engine rebuild, whether you're restoring a stock Dart block or pushing power limits in a performance application. Proper bearing selection directly impacts oil film strength, engine longevity, and peak horsepower delivery—making this component non-negotiable for serious engine work.

King Bearings' XP line delivers premium bearing material composition with optimized crush heights and controlled clearances that maintain stable oil wedge formation across the entire RPM range. The standard sizing in this kit ensures drop-in compatibility with unmodified Dart LS-series blocks while maintaining the precise geometric tolerances required for consistent crankshaft concentricity. XP-grade bearings feature enhanced corrosion resistance and superior embedability, critical properties that protect against startup wear and allow the bearing surface to bed properly during initial engine run-in phases. The compact kit dimensions (4.6 x 2.3 x 11.65 inches) house all main bearing shells needed for complete block assembly, weighing just 1.32 pounds.

Engine builders, machine shops, and DIY enthusiasts restoring or modifying Dart LS-next series blocks will find this bearing set essential for any rotating assembly refresh. Installation requires standard engine building practices: proper crankshaft clearance verification, correct bearing shell seating, and torque-angle fastening to OEM specifications. Whether you're assembling a naturally aspirated street engine, preparing a turbo platform, or rebuilding a damaged bottom end, the XP Main Bearing Set Dart LS-next Block delivers the reliability and precision that separates a long-lived engine from a marginal one. King Bearings' reputation in OEM and aftermarket applications ensures you're using bearing technology proven in millions of engine hours.