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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.

Select your application below.

Chevy: Small Block , LS , 400ci , Big Block

Chrysler: 318/340ci , 426 Hemi/440ci

Ford: 289/302ci , 351C , 351W , 4.6L SOHC (Cast Iron Block) , 4.6L SOHC/DOHC (Aluminum Block) , 4.6L/5.4L SOHC Windsor ,
          429/460 Big Block



197 Products Page: 1 2 3 4 5 ... |  Next Results per Page:

429-MB557SI
Main Bearing Set
  • Small Block Chevy
  • SI-Series
  • Standard
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  • $31.99
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    429-MB557SISTDX
    Main Bearing Set
  • Small Block Chevy
  • SI-Series
  • .001" Oversize
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  • $31.99
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    429-MB557SI001
    Main Bearing Set
  • Small Block Chevy
  • SI-Series
  • .001" Undersize
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  • $31.99
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    429-MB557SI002
    Main Bearing Set
  • Small Block Chevy
  • SI-Series
  • .002" Undersize
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  • $31.99
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    429-MB557SI010X
    Main Bearing Set
  • Small Block Chevy
  • SI-Series
  • .009" Undersize
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  • $31.99
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    429-MB557SI010
    Main Bearing Set
  • Small Block Chevy
  • SI-Series
  • .010" Undersize
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  • $31.99
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    429-MB557SI020
    Main Bearing Set
  • Small Block Chevy
  • SI-Series
  • .020" Undersize
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  • $31.99
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    429-MB557SI030
    Main Bearing Set
  • Small Block Chevy
  • SI-Series
  • .030" Undersize
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  • $31.99
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    429-MB557SI040
    Main Bearing Set
  • Small Block Chevy
  • SI-Series
  • .040" Undersize
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  • $31.99
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    429-MB557HP
    Main Bearing Set
  • Small Block Chevy
  • HP-Series
  • Standard
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  • $65.99
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    429-MB557HPSTDX
    Main Bearing Set
  • Small Block Chevy
  • HP-Series
  • .001" Oversize
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  • $65.99
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    429-MB557HP001
    Main Bearing Set
  • Small Block Chevy
  • HP-Series
  • .001" Undersize
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  • $65.99
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    429-MB557HP010X
    Main Bearing Set
  • Small Block Chevy
  • HP-Series
  • .009" Undersize
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  • $65.99
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    429-MB557HP010
    Main Bearing Set
  • Small Block Chevy
  • HP-Series
  • .010" Undersize
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  • $65.99
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    429-MB557HP011
    Main Bearing Set
  • Small Block Chevy
  • HP-Series
  • .011" Undersize
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  • $65.99
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    429-MB557HP020X
    Main Bearing Set
  • Small Block Chevy
  • HP-Series
  • .019" Undersize
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  • $65.99
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    429-MB557HP020
    Main Bearing Set
  • Small Block Chevy
  • HP-Series
  • .020" Undersize
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  • $65.99
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    429-MB557HP021
    Main Bearing Set
  • Small Block Chevy
  • HP-Series
  • .021" Undersize
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  • $65.99
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    429-MB557HP030
    Main Bearing Set
  • Small Block Chevy
  • HP-Series
  • .030" Undersize
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  • $65.99
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    429-MB557XP
    Main Bearing Set
  • Small Block Chevy
  • XP-Series
  • Standard
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  • $65.99
    Order Today Ships 04/29/14

    429-MB557XPSTDX
    Main Bearing Set
  • Small Block Chevy
  • XP-Series
  • .001" Oversize
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  • $65.99
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    429-MB557XP001
    Main Bearing Set
  • Small Block Chevy
  • XP-Series
  • .001" Undersize
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  • $65.99
    Order Today Ships 04/29/14

    429-MB557XP010X
    Main Bearing Set
  • Small Block Chevy
  • XP-Series
  • .009" Undersize
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  • $65.99
    Order Today Ships 04/29/14

    429-MB557XP010
    Main Bearing Set
  • Small Block Chevy
  • XP-Series
  • .010" Undersize
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  • $65.99
    Order Today Ships 04/29/14

    429-MB557XP011
    Main Bearing Set
  • Small Block Chevy
  • XP-Series
  • .011" Undersize
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  • $65.99
    Order Today Ships 04/29/14

    429-MB557XP020X
    Main Bearing Set
  • Small Block Chevy
  • XP-Series
  • .019" Undersize
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  • $65.99
    Order Today Ships 04/29/14

    429-MB557XP020
    Main Bearing Set
  • Small Block Chevy
  • XP-Series
  • .020" Undersize
    View this item
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  • $65.99
    Order Today Ships 04/29/14

    429-MB557XP021
    Main Bearing Set
  • Small Block Chevy
  • XP-Series
  • .021" Undersize
    View this item
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  • $65.99
    Order Today Ships 04/29/14

    429-MB557XP030
    Main Bearing Set
  • Small Block Chevy
  • XP-Series
  • .030" Undersize
    View this item
    • FREE
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  • $65.99
    Order Today Ships 04/29/14

    429-MB5293SI
    Main Bearing Set
  • LS Chevy
  • SI-Series
  • Standard
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  • $72.99
    Order Today Ships 04/29/14

    197 Products Page: 1 2 3 4 5 ... |  Next Results per Page: