King Engine Bearings CR 868HPN0.50 HP Alecular Bi-Metal Connecting Rod Bearing Set Ford V8 4.6L/5.4L SOHC 0.50mm Undersize

The King Engine Bearings CR 868HPN0.50 is a Race HP Series Alecular bi-metal connecting rod bearing set designed for Ford V8 4.6L and 5.4L SOHC engines. This set includes 8 pairs and is ground to a 0.50mm undersize crankshaft journal diameter, making it a direct replacement for engines with reground or worn crankshafts.

These bearings are part of King's HP racing line, built around the proprietary Alecular™ bi-metal construction — an aluminum/tin/silicon alloy top layer bonded directly onto a high-strength steel backing. This structure delivers a harder surface than conventional tri-metal Babbitt bearings while maintaining excellent embeddability and compatibility with nodular cast iron crankshafts.

Key Features:

• Alecular™ Bi-Metal Construction: Aluminum/tin/silicon alloy top layer on a high-strength steel back for superior load resistance
• Narrow Profile ("N" suffix): Bearings are narrower than OE/stock versions, designed for use with fillet-radius crankshafts
• 0.50mm Undersize: Engineered for crankshafts that have been reground 0.50mm undersized
• Harder than Babbitt: Vickers hardness of 40 — better withstands short-duration high loads without surface migration or extrusion
• High Temperature Threshold: Alecular material tolerates temperatures nearly 30% higher than tri-metal (450°F vs. 350°F)
• Radialock™ Technology: Optimized crush height for improved bearing-to-bore contact and reduced spin potential
• Eccentrix™ Geometry: Optimized eccentricity derived from elasto-hydrodynamic analysis for superior oil film support
• Lead-Free Material: Environmentally responsible construction without sacrificing performance
• Tight Wall Thickness Tolerances: Shell-to-shell consistency that outperforms industry standards
• Set Includes: 8 pairs (16 bearing shells total)

Ideal for drag racing, monster truck, tractor pull, and other high-performance applications that demand a harder-than-Babbitt top layer to resist extrusion and material migration under extreme loads. Also well-suited for street/strip performance builds and any application using nodular cast iron crankshafts.