King Engine Bearings CR4541XPSTDX XP Series Tri-Metal Performance Connecting Rod Bearing Set

The King Engine Bearings CR4541XPSTDX is a XP Series pMax Black tri-metal performance connecting rod bearing set designed for Honda F23A, F23Z, and K20A3 16-valve engines. Engineered for high-load, long-duration performance applications, this set delivers a measurable upgrade over standard OEM bearings and is the preferred choice for builders running forged steel aftermarket crankshafts under sustained high-RPM and high-load conditions.

pMax Black Tri-Metal Construction:

• Enhanced tri-metal copper-lead construction with a nickel barrier and proprietary SecureBond adhesion process for superior stability between the top and intermediate layers
• Overlay is 24% harder than conventional tri-metal race bearings, delivering superior fatigue resistance and surface protection
• 0.0005" metallurgically enhanced and hardened performance overlay withstands extreme loads and resists surface fatigue
• Load capacity of 17,000 psi in the intermediate layer and 10,200 psi in the overlay — among the highest available in the industry
• 15%–30% greater overall load capacity compared to traditional bearings

Precision Geometry & Design Features:

• Bull's Eye Tolerance: Wall thickness controlled to ±0.0001" — tighter than the industry standard of ±0.00025" — for consistent fitment shell-to-shell
• Increased Crush Height: Improved bearing-to-bore contact and heat transfer, reducing spin potential at high RPM
• Narrowed Design: Crank-cheek side narrowing accommodates large-radius crankshafts
• Medium Eccentricity: Optimized via elasto-hydrodynamic analysis for ideal load distribution and oil film maintenance
• Improved Oiling: Geometry optimized to maintain oil film under sustained high-load conditions

Applications:

• High-load, long-duration racing including circle track, off-road, and off-shore applications
• Performance street and track builds using forged steel aftermarket crankshafts
• Ideal for Honda F23A, F23Z, and K20A3 16-valve engine platforms

Set Includes: 4 connecting rod bearing shells (2 pairs) — Standard size (STDX clearance).

King Engine Bearings has specialized exclusively in engine bearings since 1960, bringing aviation- and racing-grade engineering standards to every product. The XP Series represents the pinnacle of their performance lineup, combining advanced metallurgy with precision geometry for builders who demand the best.