King Engine Bearings CR803HPN011 HP-Series Connecting Rod Bearing Set Chevy SBC 265 283 327 .011 Undersize

The King CR803HPN011 is an HP-Series connecting rod bearing set designed for high-performance Chevrolet small block applications covering the 265ci, 283ci, and 327ci engines. This set is sized at .011" undersize, meaning it is engineered for use with a crankshaft that has been ground down (turned) by .011" from standard journal diameter.

King's HP-Series bearings are built around a bi-metal silicon-aluminum (Alecular) alloy construction on a high-strength steel backing. The Alecular material features a single, deep layer (.012"–.015") that delivers superior embedability, conformability, and resistance to overlay migration — critical properties for high-load racing environments.

Key Features:

• HP-Series bi-metal silicon-aluminum construction — race-proven Alecular alloy on steel backing
• Narrowed bearing profile — designed to clear large-radius (large fillet) aftermarket crankshafts
• .011" undersize — for use with crankshafts turned .011" under standard journal diameter
• Chamfered oil holes — optimized oil feed to accommodate aftermarket cranks with large journal radii
• Fine micro-bore finish — promotes proper oil film development and reduces friction
• High heat threshold — rated to 450°F for superior protection against friction and overheating
• 40 Vickers hardness — resists overlay migration and extrusion under sustained high load
• Sold as a complete engine set (8 pairs)

King HP-Series bearings are the ideal choice for high-load, short-duration racing applications such as drag racing, tractor pulling, and monster truck competition. They are also well-suited for blown, turbocharged, nitrous, and alcohol-fueled engine builds using aftermarket crankshafts.

Note: "Undersize" refers to a thicker bearing shell used when the crankshaft journal has been machined to a smaller diameter. This bearing is not thinner than stock — the crankshaft itself is undersized.