King Engine Bearings CR4604XP XP Series Connecting Rod Bearing Set

The King Engine Bearings CR4604XP is a high-performance connecting rod bearing set designed for Ford 2.3L Duratec and Mazda L3-VDT MZR turbocharged engines. Part of King's XP Series, these bearings are engineered for extreme racing applications that demand superior load capacity and durability over extended periods.

pMax Black Tri-Metal Construction:

The CR4604XP features King Racing's exclusive pMax Black technology, a tri-metal structure that is 24% harder than conventional tri-metal race bearings. This advanced metallurgical construction combines an enhanced copper-lead bearing material with a nickel barrier layer and SecureBond adhesion technology for exceptional strength and stability. The performance overlay is metallurgically enhanced and hardened to just 0.0005", providing outstanding resistance to surface fatigue under high loads.

Key Performance Features:

• Bulls Eye Tolerance: Industry-leading wall thickness tolerances with all bearing shells matched to 0.0001" for consistent performance
• 15-30% Greater Load Capacity: Significantly outperforms traditional bearings in high-stress applications
• Increased Bearing Height: Improves bearing-to-bore contact and heat transfer while reducing spin potential at high RPM
• Medium Eccentricity Design: Optimizes load distribution and enhances oil film characteristics
• SecureBond Adhesion: Proprietary bonding process ensures superior stability between bearing layers
• Narrowed Design: Accommodates large-radius aftermarket crankshafts

Ideal Applications:

The XP Series CR4604XP is specifically developed for high-load, long-duration racing applications including circle track, off-road, marine offshore racing, and other demanding motorsports that utilize forged steel aftermarket crankshafts. These bearings excel in turbocharged and high-compression builds where extreme cylinder pressures and extended operating periods push conventional bearings beyond their limits.

Compatible with Ford 2.3L Duratec and Mazda L3-VDT MZR turbo engines, the CR4604XP bearing set provides the reliability and performance margin required for competitive racing and extreme street performance applications.