King Engine Bearings CR1057GPC0.25 Connecting Rod Bearing Set pMaxKote 0.25mm Undersize

The King Engine Bearings CR1057GPC0.25 is a performance connecting rod bearing set featuring King's advanced XP tri-metal construction with pMaxKote™ polymer coating and a partial oil groove design, in a 0.25mm undersize dimension for use with reground crankshafts.

King's pMaxKote™ is a factory-applied nano-composite polymer coating applied over the pMaxBlack™ hardened overlay. It introduces ceramic nano-composite particles as a fourth functional layer, significantly enhancing wear resistance, seizure resistance, and cavitation protection—without altering the bearing's precision wall thickness dimension.

Key Features:

• XP Tri-Metal Construction – Copper-lead intermediate layer delivers exceptional load capacity and fatigue resistance for high-performance and racing applications
• pMaxKote™ Polymer Coating – Factory-applied nano-composite ceramic polymer coating enhances wear resistance and protects against oil starvation events
• Partial Oil Groove (G) – Optimized oil groove geometry maintains oil flow while increasing bearing load capacity
• 0.25mm Undersize – Engineered for use with crankshafts that have been reground 0.25mm undersize
• Bull's Eye Tolerance™ – Industry-leading wall thickness tolerance of ±0.0001", ensuring exceptional shell-to-shell consistency and minimal adjustment during assembly
• pMaxBlack™ Hardened Overlay – Proprietary nano-scaled hardening process produces superior load capacity beneath the pMaxKote™ coating

King Engine Bearings has specialized exclusively in engine bearing design and manufacture since 1960. Every bearing is produced entirely in-house, from alloy casting through overlay plating, ensuring complete process control and rigorous quality standards. The CR1057GPC0.25 is well-suited for high-output, high-load engine builds requiring a 0.25mm undersize connecting rod bearing with a premium protective coating.