King Engine Bearings CR4440XP STDX XP-Series Performance Connecting Rod Bearing Set

The King Engine Bearings CR4440XP STDX is an XP-Series performance connecting rod bearing set engineered for high-demand applications. Featuring King's proprietary pMax Black™ tri-metal overlay technology, these bearings deliver superior load capacity, enhanced seizure resistance, and exceptional wear protection compared to standard OEM-style replacements.

The STDX sizing designation indicates a tighter-than-standard tolerance specification, purpose-built for performance and racing engine builds where precise oil clearances are critical to maximizing power output and bearing longevity.

Key Features:

• XP-Series tri-metal construction with pMax Black™ polymer overlay for high-load performance
• STDX (Standard Extra-tight) sizing for optimized oil film and reduced bearing clearance
• Industry-leading wall thickness consistency, minimizing shell-to-shell variation
• 90° oil groove geometry maintains oil flow integrity and expands bearing load surface area
• Optimized eccentricity profile developed through elasto-hydrodynamic analysis
• Lead-free overlay material for environmental compliance and improved safety
• Designed for performance street, track, and competition engine builds

King Engine Bearings has been a trusted name in precision engine bearings since 1960, with an in-house TechLab R&D division recognized as a leading authority in bearing science. The CR4440XP STDX is the performance upgrade choice for builders seeking tighter tolerances and greater reliability over standard replacement bearings.