King Engine Bearings MB529XPC010 XPC Race Main Bearing Set Ford 260 289 302 Windsor pMaxKote Coated

The King Engine Bearings MB529XPC010 is a premium XPC-series race main bearing set engineered for Ford small-block Windsor engines, including the 260ci, 289ci, 302ci, and 5.0L variants. Built for serious race applications, this set combines King's advanced tri-metal construction with their proprietary pMaxKote™ nano-composite polymer coating for industry-leading protection and load capacity.

pMaxBlack™ Tri-Metal Construction:

• Enhanced tri-metal copper-lead construction with nickel barrier and SecureBond™ adhesion process
• pMaxBlack™ overlay features a proprietary nano-scaled hardening process, producing a fatigue-resistant shield that is 24% harder than conventional tri-metal race bearing overlays
• Superior intermediate layer with increased tin content (4.5%) delivers a load-carrying capacity of 17,000 psi
• SecureBond™ micro-etch surface preparation strengthens tri-metal structural integrity and greatly reduces the risk of delamination under extreme load

pMaxKote™ Nano-Composite Polymer Coating:

• Factory-applied nano-composite polymer coating applied directly over the pMaxBlack™ overlay
• Contains ceramic nano-composite particles that function as a fourth protective layer for superior wear resistance
• Proven protection during metal-to-metal contact and against the erosive effects of cavitation
• Applied with no added wall thickness, preserving original oil clearance specifications

XPC Series Race Features:

• Designed for high-load, long-duration racing including circle track, off-road, and similar applications requiring steel crankshafts
• 15–30% greater load capacity than traditional engine bearings
• 0.0005" metallurgically enhanced and hardened performance overlay for improved fatigue resistance
• Mains are half-grooved for uncompromised lower shell load capacity
• Bull's Eye Tolerance™ manufacturing ensures wall thickness far tighter than industry standard

The MB529XPC010 is offered in a 0.010" undersize and is part of King's Racing line — developed through rigorous lab testing and on-track validation. It is the ideal choice for performance Ford Windsor engine builds demanding maximum durability and protection.