King Engine Bearings CR 805XPN 021 XP-Series Tri-Metal Connecting Rod Bearing Set Chrysler 273 318 340 360

The King Engine Bearings CR 805XPN 021 is a high-performance XP-Series connecting rod bearing set designed for Chrysler small-block engines including the 273ci, 318ci, 340ci, and 360ci. Part of King's race-proven pMax Black lineup, these bearings are engineered for demanding performance applications requiring superior load capacity and fatigue resistance. The 021 size designation indicates a 0.020" undersize crankshaft with 0.001" extra oil clearance.

pMax Black Tri-Metal Construction:

• Tri-metal copper-lead structure with a nickel plate barrier and lead/tin/copper Babbitt overlay over a steel backing for superior stability and durability
• Nano-scaled hardening process creates a black fatigue-resistant shield — overlay is 24% stronger than conventional tri-metal race bearings
• Overlay load capacity of 10,200 PSI and intermediate layer capacity of 17,000 PSI for extreme performance reliability
• SecureBond adhesion process delivers 17% more fatigue strength compared to standard tri-metal designs

XP-Series Geometric Features:

• Narrowed crank cheek side with increased crush height for improved bearing-to-bore contact and heat transfer
• Reduced spin potential in high-RPM applications
• Wall thickness tolerance of ±0.0001" — significantly tighter than the industry standard of ±0.00025" for consistent, accurate fitment
• Greater bearing-to-bearing consistency reduces adjustment time during engine assembly
• One-set fitment — engineered so you don't need to purchase multiple sets to achieve desired oil clearance

Application & Race Use:

• Designed for performance applications using forged steel aftermarket crankshafts under high-load, long-duration conditions
• Ideal for circle track, drag racing, off-shore, and off-road race applications
• Compatible with Chrysler, Dodge, Jeep, and Plymouth engines in the 273ci, 318ci, 340ci, and 360ci displacements

Set Details:

• Size: 0.021" (0.020" undersize crankshaft / +0.001" extra clearance)
• MPN: CR 805XPN 021

King Engine Bearings specializes exclusively in engine bearings, bringing focused engineering expertise and race-proven performance to every set they produce. The CR 805XPN 021 is the ideal choice for Chrysler small-block performance builds demanding precision, strength, and reliability under extreme loads.