King Engine Bearings CR1057GPCSTDX GPC Silver Composite Connecting Rod Bearing Set Standard Size Extra Oil Clearance

The King Engine Bearings CR1057GPCSTDX is a GPC Series (Silver Composite, Polymer Coated) connecting rod bearing set in standard size with extra oil clearance (+0.001"). Engineered for high-output and modified engines, the GPC series addresses the limitations of conventional race bearings by combining a unique tri-metal construction with an advanced silver-based overlay and a protective polymer topcoat.

The GPC material is King's solution for extreme load applications. Unlike standard race bearings that peak around 11,000 PSI, the GPC tri-metal structure is rated to handle 17,000 PSI of load capacity. This makes it an ideal choice for high-horsepower builds where cylinder pressures and rod loading exceed what conventional performance bearings can reliably withstand.

GPC Construction — Layer by Layer:

• Top Layer: 10-micron polymer coating containing solid lubricant and ceramic additives for protection during marginal lubrication events
• Overlay: Silver-based overlay containing solid lubricant particles — provides exceptional load capacity and high-temperature stability
• Intermediate Layer: Lead-free bronze with additional tin for high structural rigidity
• Base: Strengthened steel backing for maximum dimensional stability

Key Features:

• STDX sizing — Standard bore diameter with +0.001" extra oil clearance for additional film thickness in performance applications
• 17,000 PSI load capacity — Significantly outperforms conventional tri-metal race bearings rated to ~11,000 PSI
• Polymer topcoat — Protects bearings during metal-to-metal contact and oil starvation events common in modified engines
• Bull's Eye Tolerance™ — Wall thickness held to ±0.0001" for consistent, precise oil clearance shell-to-shell
• Lead-free intermediate layer — Environmentally responsible construction without sacrificing load capacity
• Full tri-metal construction — Steel backing, bronze intermediate, and silver overlay for a balanced combination of strength, conformability, and surface protection

King Engine Bearings has specialized exclusively in engine bearings since 1960, and the GPC series represents the pinnacle of their racing line — developed through King's in-house TechLab R&D program. The CR1057GPCSTDX is well-suited for performance street builds, forced-induction engines, and track-day applications where high cylinder pressures and modified oiling systems demand more than a standard bearing can provide.