Main Bearing - HP - Standard - Mopar 426 Hemi / RB-Series - Kit

King Engine Bearings Chrysler 426CI/440CI V8 OHV1 (STD Size) Crankshaft Main Bearing Set

Part Type

Engine Crankshaft Main Bearing Set

Product Overview

The HP series was developed mainly for drag race applications needing a material that is harder than the Babbitt top layer. These applications demanded a structure that could withstand high loads for short duration and still offer higher embedabilty and compatibility. In response, KING developed the HP Series featuring the Alecular™ metal structure.

The HP series is also suited for many performance applications with nodular cast iron crankshafts, such as street, strip and some levels of circle track racing.

All King Bearings are specifically engineered to withstand the highest loads and RPMs generated by today’s top competition engines. All King Performance Engine Bearings feature:
• *“Bull’s Eye Tolerance”*. King engine bearings have the closest wall tolerances in the industry, with all shells matched to 0.0001".
• *Increased Height.* Greater rod bearing height improves bearing-to-bore contact/heat transfer and reduces spin potential at high RPM.
• *Improved Oiling.* Mains feature enlarged, chamfered oil holes.
• *Medium Eccentricity.* This enables optimum load distribution and improved oiling.
• *Dowel Holes.* Most rod bearings are available with or without dowel holes.
• *Narrowed Design.* Mains and rods are narrowed for large-radius crankshafts.

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

*HP series is particularly suitable for the following cases:*
• When a tri-metal bearing’s Babbitt overlay extrudes over the sides, migrates to one end, or is physically removed by the crankshaft
• When the intermediate layer of a tri-metal bearing is exposed, damaging the crank journal and requiring expensive grinding or replacement
• When Contaminants enter the oil stream, scratching and damaging the crankshaft journals
*King HP Bearings Features*

*Applications*
• 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

*Construction*
Bi-metal aluminum silicon alloy featuring fine micro-bore finish

*Features*
• 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

These additional application notes are supplied by the manufacturer and collated from multiple year ranges. Not all of these notes may apply to every year or every variant. Please contact a StreetFX agent for clarification if required.

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Product Details

Reference Information

Main Bearings, HP-Series, 1/2 Groove, Standard Size, Bi Metal, Mopar, 426, 440, 426 Hemi, Set of 5

King HP-Series main bearings are recommended for street and strip performance applications. They're designed for blown, turbocharged, NOS, and alcohol-fueled engines using aftermarket crankshafts. These main bearings have greater eccentricity for superior oiling at high rpm, and a chamfered surface for large radii crankshafts. HP-Series bearings also feature large, chamfered oil holes—and are available in 1/2 grooving for improved oiling to withstand high-rpm applications. Order the bearings designed for fitment with your specific engine.