King Engine Bearings Main Bearing Set GM LS Vortec Gen III IV

King Engine Bearings main bearing sets for GM LS and Vortec Gen III and Gen IV V8 engines support the crankshaft and keep it turning smoothly under load. These crankshaft main bearings are for engine rebuilds, performance builds, and routine overhauls. They are also sold as engine main bearing sets or crank bearings.

Key Features:

• Made by King Engine Bearings, a long-established maker of precision engine bearings for street, racing, and heavy-duty use
• Multi-layer bearing construction is designed to resist wear and fatigue and to handle the loads of daily driving and high-output engines
• Precision-machined shells help give consistent oil clearance and proper crankshaft support
• Designed for GM LS and Vortec Gen III and Gen IV engine families
• Available in multiple sizes, so you can match the set to your crankshaft journal dimensions

Choose the correct size for your crankshaft and block, then measure journals and clearances as part of a proper engine assembly. A quality main bearing set helps protect the crankshaft and extends engine life.