King Engine Bearings CR4507XPSTDX XP Series Tri-Metal Connecting Rod Bearing Set

The King Engine Bearings XP Series CR4507XPSTDX is a high-performance connecting rod bearing set engineered for Mazda MZR 2.3L 16V and Ford Duratec 2.3L 16V engines. Designed for extreme racing applications that demand maximum load capacity and durability, these bearings feature King's advanced pMax Black tri-metal construction that delivers exceptional strength and longevity under the most demanding conditions.

Advanced pMax Black Tri-Metal Construction:

• 24% harder than conventional tri-metal race bearings for superior durability
• Enhanced copper-lead tri-metal structure with nickel barrier layer
• SecureBond adhesion process ensures superior stability between layers
• 0.0005" metallurgically enhanced and hardened performance overlay resists surface fatigue
• 15% to 30% greater load capacity than traditional performance bearings

Precision Engineering Features:

• Bull's Eye Tolerance - Industry-leading wall tolerances with all shells matched to 0.0001"
• Increased bearing height improves bore contact, heat transfer, and reduces spin potential at high RPM
• Medium eccentricity design enables optimum load distribution and improved oiling
• Narrowed design accommodates large-radius crankshafts
• Available with or without dowel holes for installation flexibility

Ideal Applications:

• Circle track racing with extended duration events
• Off-road and off-shore racing applications
• High-load performance builds using forged steel aftermarket crankshafts
• Competition engines operating at sustained high loads and RPM

The XP Series represents King Racing's commitment to meeting the extreme demands of modern race engine builders who consistently push performance boundaries. These bearings are specifically engineered to withstand the highest loads and RPMs generated by today's top competition engines, making them the ideal choice for serious racers and engine builders.