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King Main Bearings for Domestic Vehicles


King Engine Bearings
King Main Bearings for Domestic Vehicles

Product images may differ from actual product appearance.

King offers 3 levels of main bearings for use in OE Stock, High Performance, and Extreme Performance applications. King main bearings are sold in engine sets.



AM-Series & SI-Series Bearings:
King AM-Series & SI-Series bearings are recommended for OE applications. AM-Series bearings are aluminum-copper-tin plus Alloy on high-strength steel (Bi-Metal). SI-Series bearings are Silicon-Aluminum bearings (Bi-Metal) are designed for Aftermarket Gasoline or Diesel Engine Rebuilding & Performance Engines with OE Crankshafts.

HP-Series Bearings:
King HP-Series bearings are recommended for street and strip high performance applications. These Bi-Metal Silicon Aluminum bearings are designed for blown, turbocharged, NOS, and alcohol-fueled engines using aftermarket crankshafts. These bearings have chamfered oil holes are fit aftermarket cranks machined with a large radii at the edge of the journals. Most main bearings in the HP-Series are 3/4 grooved for improved oiling to the rod journals. Ideal for use in High Load, Short Duration Applications like Drag Racing, Tractor Pulling, Monster Trucks, etc.

XP-Series Bearings:
King XP-Series bearings are for extreme performance in high-load capacity applications. These Tri-Metal copper lead bearings are designed use on cranks with large radii (narrow rod bearings) and feature enlarged, chamfered oil holes with 1/2 grooving (on most main bearings) for uncompromised lower bearing load capacity. Ideal for use in High Load Circle Track & Endurance Applications.


What does the King part number Prefix/Suffix mean?




NOTE: The term "Undersize" refers to a thicker bearing which is used when the Crankshaft has been turned down and is now undersized, not the bearing itself. The term "Oversize" is typically a thinner bearing than stock to allow for increased clearance.


10 Products

429-MB5293SI020
Main Bearing Set
  • LS Chevy
  • SI-Series
  • .020" Undersize
  • Was: $72.99
    Now: $24.99
    Ships

    429-MB5293SI030
    Main Bearing Set
  • LS Chevy
  • SI-Series
  • .030" Undersize
  • Was: $72.99
    Now: $24.99
    Ships

    429-MB5013XP
    Main Bearing Set
  • LS Chevy
  • XP-Series
  • Standard
  • Was: $155.99
    Now: $63.99
    To order this item contact Customer Service at 1-800-345-4545.

    429-MB5013XP020
    Main Bearing Set
  • LS Chevy
  • XP-Series
  • .020" Undersize
  • Was: $159.99
    Now: $63.99
    Ships

    429-MB556HP030
    Main Bearing Set
  • Big Block Chevy
  • HP-Series
  • .030" Undersize
  • Was: $86.99
    Now: $44.99
    Ships

    429-MB529SI030
    Main Bearing Set
  • Ford 289/302ci Small Block
  • SI-Series
  • .030" Undersize
  • Was: $25.99
    Now: $11.99
    Ships

    429-MB529HP001
    Main Bearing Set
  • Ford 289/302ci Small Block
  • HP-Series
  • .001" Undersize
  • Was: $76.99
    Now: $41.99
    Ships

    429-MB529HP020
    Main Bearing Set
  • Ford 289/302ci Small Block
  • HP-Series
  • .020" Undersize
  • Was: $76.99
    Now: $41.99
    Ships

    429-MB529HP030
    Main Bearing Set
  • Ford 289/302ci Small Block
  • HP-Series
  • .030" Undersize
  • Was: $76.99
    Now: $41.99
    Ships
    Oldsmobile AM-Series Main Bearings

    429-MB5514AM030
    Main Bearings Set
  • Oldsmobile 260/307/330/350/403
  • AM-Series
  • .030" Undersize
  • Was: $67.99
    Now: $24.99
    Ships

    10 Products