King Engine Bearings Engine Connecting Rod Bearing Pair

King Engine Bearings: Precision-Engineered Connecting Rod Bearing Pairs

When it comes to engine bearings, few names carry as much weight as King Engine Bearings. Founded in 1960 with a singular focus — engine bearings and nothing else — King has spent over six decades refining the science of bearing design, metallurgy, and manufacturing. That laser focus makes their Engine Connecting Rod Bearing Pairs some of the most respected components in the industry, trusted by OE engine builders and race teams alike.

Why Connecting Rod Bearings Matter

The connecting rod bearing sits between the connecting rod and the crankshaft journal, creating a critical oil-film interface that prevents metal-to-metal contact at thousands of RPM. Under load, these small shells endure enormous combustion forces with every power stroke. An imprecise or worn rod bearing translates directly into power loss, increased wear, and — in worst-case scenarios — catastrophic engine failure. Choosing the right bearing pair for your application is one of the most consequential decisions in any engine build or rebuild.

King's Connecting Rod Bearing Series & Technologies

King offers connecting rod bearing pairs across several distinct series, each engineered for a specific performance envelope:

• CP-Series (OE Replacement): King's CP-Series rod bearings are premium OE-replacement units constructed from copper-lead on steel with a copper-lead-tin over-plate, delivering temperature resistance and high-load capacity suitable for street engines and daily drivers.
• XP-Series (High Performance / Racing): Designed for engines subjected to sustained, extreme stress — road racing, circle track, and high-output street builds — the XP-Series features King's proprietary pMaxBlack™ tri-metal structure. This architecture delivers a 29% increase in overlay hardness and a 24% increase in load capacity compared to conventional tri-metal race bearings. XP rod bearings are also narrowed on the crank-cheek side with increased crush height for improved bearing-to-bore contact, better heat transfer, and reduced spin potential at high RPM.
• XPC-Series (Extreme Racing): The XPC designation steps up even further for top-tier motorsport applications, incorporating pMaxBlack™ construction with additional geometric refinements proven on the race track.
• SV-Series: For extreme-load engines, King's SV-Series uses a lead-free, tri-metal silver-based overlay material with solid lubricant additives distributed throughout the silver matrix — capable of serving as a sputter bearing replacement.

Across all performance series, King's rod bearing pairs can be specified with the optional pMaxKote™ nano-composite polymer coating, a factory-applied layer that enhances wear resistance and protects bearing surfaces during cold starts or momentary oil-starvation events — a meaningful advantage in racing conditions.

Engineering Precision You Can Trust

What distinguishes King's connecting rod bearing pairs from generic alternatives is the depth of engineering behind every shell. King uses its proprietary ENSIM simulation software to model combustion pressure, crankshaft dynamics, and bearing load at every angle of rotation — ensuring each design is optimized before a single part is manufactured. Features like the U-Groove™ increase load-bearing surface area without compromising oil flow, while RadiaLock™, EccentriX™, and SmartLug™ geometries address bearing retention, eccentricity control, and lug design in ways that generic bearings simply cannot match. King is also a certified TS16949 (automotive) and AS9100 (aerospace) manufacturer, meaning every connecting rod bearing pair passes rigorous quality control checkpoints from raw material to finished product.

Whether you are refreshing a daily driver or assembling a purpose-built race engine, King Engine Bearings connecting rod bearing pairs provide the fit, finish, and metallurgical integrity your build demands. Browse the full selection of Engine Connecting Rod Bearing Pairs to find the right King series for your application.