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They were developed for all performance applications that use forged steel aftermarket crankshafts and produce high loads for extended periods.King focuses on one product bearings and nothing else. Their innovative race-only Xtreme Performance Max Black Tri-Metal rod bearings have a 24 percent stronger overlay and 17 percent more fatigue strength by using a micro process called SecureBond. Built with enhanced tri-metal King XP-Series rod bearings layer copper-lead construction with a nickel plate barrier and a lead/tin/copper Babbitt overlay over a steel backing in an adhesion process that provides superior stability and durability. King’s advanced control measures hit a bull’s-eye maintaining wall thickness tolerances far tighter than their competitors at an amazing +/- .0001 in.! XP-Series rod bearings are narrowed on the crank cheek side with increased crush height for improved bearing-to-bore contact heat transfer and reduced spin potential in high-rpm applications.
- Increased Height. Greater rod bearing height improves bearing-to-bore contact/heat transfer and reduces spin potential at high RPM.
- Improved Oiling. Mains feature enlarged chamfered oil holes.
- Medium Eccentricity. This enables optimum load distribution and improved oiling.
- Dowel Holes. Most rod bearings are available with or without dowel holes.
- Narrowed Design. Mains and rods are narrowed for large-radius crankshafts.
- Applications.
- High-load long-duration racing such as circle.