King Engine Bearings MB5293MC010 MC Series Coated Main Bearing Set .010" Undersize

The King Engine Bearings MB5293MC010 is a premium main bearing set designed specifically for GM LS and LT engines with stock crankshafts.

The MC Series represents King's innovative approach to OE replacement bearings, featuring their proprietary K-340 nano-composite polymer coating. This advanced coating was originally engineered for modern start/stop engine technology, which creates more frequent mixed lubrication and metal-to-metal contact conditions during engine startup cycles.

Key Features:

• Nano-composite polymer coating for superior anti-friction and wear resistance
• Ideal for stock replacement and mild performance applications with factory crankshafts
• Aluminum-based bi-metal construction for excellent durability
• Enhanced protection during engine startup and auto start/stop operation
• Improved finish to reduce microscopic peaks on nodular cast iron crankshafts
• Optimized oil clearance to reduce wear and extend engine life
• Up to 0.0002" added thickness due to polymer coating

Compatible with a wide range of GM LS and LT engines including LS1, LS2, LS3, LS6, LSA, L92, L99, LM7, LQ4, LQ9, LR4, L33, L76, L77, LY6, L96, LT1, L83, L86, LT4, L84, L87, and L8T applications. This bearing set is specifically engineered for engines with stock crankshafts and is not recommended for aftermarket forged crankshafts.

Note that King no longer includes locating tabs on upper bearings to allow broader application compatibility. Upper bearing shells should be installed centered in the block saddles and will be held in place by crush force when main caps are properly torqued.