King Engine Bearings Performance Main

King Engine Bearings Performance Main Bearings are crankshaft main bearings built for high-performance street, sport compact, drag, circle track and road racing engines. King has made nothing but engine bearings since 1960. The line is designed to hold up under higher loads, higher RPM and sustained stress than standard replacement bearings.

Key Features:

• Performance bearing constructions: The line includes tri-metal designs with a copper/lead overlay and nickel barrier over a steel backing. It also includes bi-metal designs with an aluminum alloy surface bonded to steel.
• Strong layer bonding: Tri-metal bearings use King's SecureBond process to keep the layers stable and durable under load.
• Optional polymer coating: Coated versions add wear resistance without changing the bearing's wall dimensions.
• Oiling design: Chamfered oil holes and grooving options help deliver oil to the journal.
• Crankshaft clearance: Many applications are narrowed to clear large-radius crankshafts.
• Tight tolerances: Precision machining helps control installed oil clearance and bearing pressure.
• Size options: Many applications are offered in standard and a range of undersizes, so the bearing can be matched to the crankshaft journals.

These main bearings suit engine builders who want a durable, precisely made bearing for rebuilds and performance builds. Check the specifications of each individual part number to confirm the bearing series, coating and size.