King Engine Bearings MB5840SI0.75 Gen III Hemi 5.7/6.1/6.4 Main Bearing Set 0.75mm Oversize

The King Engine Bearings MB5840SI0.75 is a complete crankshaft main bearing set designed for the Chrysler/Dodge Generation III HEMI family of engines, including the 5.7L, 6.1L, and 6.4L displacements. This is the 0.75mm oversize version, intended for use with reground or worn crankshafts that require an undersized journal fit.

Constructed using King's bimetal SI (aluminum-silicon) material, this bearing set blends aluminum with 2.5–3% silicon to deliver excellent strength and durability. This lead-free formulation makes it an environmentally responsible choice and a direct OE-quality replacement.

Key Features:

• Bimetal SI construction — aluminum base reinforced with 2.5–3% silicon for superior strength
• 0.75mm oversize — engineered for reground crankshafts requiring material compensation
• Lead-free material — an eco-conscious, high-performance OE replacement
• Optimized for medium-load engines with nodular cast iron crankshafts
• Bull's Eye Tolerance™ Technology — King's proprietary production process combining precision machining, overplating, and computerized wall thickness monitoring

King Engine Bearings has been a trusted name in precision engine bearings since 1960, supplying the automotive, marine, aviation, and motorsports industries with bearings engineered to exacting tolerances. The SI series is an ideal lead-free OE replacement for stock and mild performance HEMI rebuilds.