King Racing Line

King Racing Line- The science of speed

King designs and manufactures cutting edge performance bearings that excel in accuracy and load capacity. The King Racing line combines Sport Compact and Domestic engine bearings with ground-breaking geometric and metallurgical features. Equipped with advanced materials and construction techniques, King Racing bearings extend the limits of power, performance and durability.

King bearings are a product of innovative R&D processes, extensive lab tests and “on-track” trials. We combine over 50 years of expertise, superior standards and advanced in-house simulation technologies to achieve better results.

We are constantly exploring new ways to improve our products and advance our race bearing technologies. To find out more, visit:

King Racing Line video:

  • “Bull’s Eye Tolerance”- Perfect Clearance in Every Set

    Bull’s Eye Tolerance™ is a production technology developed by King. It combines highly accurate machining, overplating, and computerized wall thickness monitoring that adjusts the process on-the-spot. Bull’s Eye Tolerance™ outperforms the industry’s wall thickness tolerance, ensuring the least thickness variation shell-to-shell. The outcome: A new standard in bearing thickness consistency.

  • pMAX-Black™- a unique tri-metal structure developed to meet the ongoing demand for increased engine bearing load capacity.

- 24% harder than typical race bearings

-More fatigue resistance

-SecureBond™ – A micro-etch process  that improves multi-layer adhesion  and structural integrity

-Compatible with all crankshafts

  • U-Groove™ a unique 90⁰ oil groove shape. U-Groove™ increases bearing load capacity by expanding the surface area, while keeping oil flow capacity intact.

  • Eliptix™-  a newly designed oil slot/oil hole hybrid that improves oil ingress, without affecting the bearing’s surface.  The innovative changes to the slot hole prevent a compromised load capacity.


  • RadiaLock™ - an optimal crush height value determined by a robust R&D process that customizes each bearing crush height  to its specific performance


  • EccentriX™- is an optimized eccentricity value reached through elasto-hydrodynamic analysis and dynamic calculations. During the process, a range of eccentricity values are analyzed, taking into account oil wedge formation, oil pressure, oil temperature, oval deformation and more. Each bearing’s eccentricity value is designed to meet specific performance requirements and to ensure a perfect hydro-dynamic regime.



We offer the industry’s widest selection of sizes, including special clearance options. With more choices than ever, you’ll find the right King HP and XP High Performance Engine Bearings for your most demanding applications.

HP Bearings XP Bearings
  • High-load, short-duration racing such as drag racing, tractor pulls, monster trucks, etc.
  • Medium-load, long-duration racing such as circle track engines using nodular cast iron crankshafts
  • High-load, long-duration racing such as circle track, off-road, off-shore, and others that require steel crankshafts
  • Bi-metal aluminum silicon alloy featuring fine micro-bore finish
  • Enhanced tri-metal copper lead construction with nickel barrier and SecureBond adhesion
  • 0.015″ thick top layer for superior macro particle embedability and conformability
  • 40 Vickers hardness to resist overlay migration and extrusion
  • 450°F heat threshold for superior protection against friction and overheating
  • Mains are 3/4 grooved for improved oiling to the rod journals
  • 15% – 30% greater load capacity than traditional bearings
  • The SecureBond unique adhesion process, for superior stability between the top and intermediate layers
  • 0.0005″ metallurgically enhanced and hardened performance overlay withstands greater loads and better resists surface fatigue
  • Mains are 1/2 grooved for uncompromised lower shell load capacity