King XP-Series Main Bearings

4.43 out of 5 stars 44 Customer Reviews

Built with enhanced tri-metal, King XP-Series main bearings have a layered copper lead construction, with a nickel plate barrier and lead/tin/copper Babbitt overlay

Built with enhanced tri-metal, King XP-Series main bearings have a layered copper lead construction, with a nickel plate barrier and lead/tin/copper Babbitt overlay over a steel backing--in an adhesion process that provides superior stability and durability. King's advanced control measures hit a bull's-eye, maintaining wall thickness tolerances far tighter than their competitors: an amazing +/- .0001 in. The XP-Series main bearings are narrowed for large radii crankshafts and feature enlarged, chamfered oil holes with full, 3/4 in., or 1/2 in. grooving for improved oiling. They deliver consistent and reliable perfor

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King XP-Series Main Bearings MB 557XP

Main Bearing, XP-Series, Standard, Tri Metal, Chevy, Small Block, Set of 5

Part Number: KGB-MB557XP

5.0 out of 5 stars ( 3 )

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King XP-Series Main Bearings MB 556XPN

Main Bearings, XP-Series, Narrowed, Tri-metal, 1/2 Groove Style, Stock Size, Chevrolet, Big Block, Set of 5

Part Number: KGB-MB556XPN

Not Yet Reviewed

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King XP-Series Main Bearings MB 557XPSTDX

Main Bearing, XP-Series, Copper/Lead/Nickel, Standard Size, Chevy, Small Block, Set of 5

Part Number: KGB-MB557XPSTDX

5.0 out of 5 stars ( 2 )

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King XP-Series Main Bearings MB 556XPN STDX

Main Bearings, XP-Series, Narrowed, Tri-metal, 1/2 Groove Style, Stock Size, Chevrolet, Big Block, Set of 5

Part Number: KGB-MB556XPNSTDX

Not Yet Reviewed

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King XP-Series Main Bearings MB 557XP 010

Main Bearing, XP-Series, Copper/Lead/Nickel, 0.010 in. Crankshaft Undersize, Chevy, Small Block, Set of 5

Part Number: KGB-MB557XP010

3.0 out of 5 stars ( 2 )

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King XP-Series Main Bearings MB5505XP STDX

Main Bearings, XP-Series, Copper/Lead/Nickel, Standard Size, Ford, Lincoln, Mercury, 351W, 351M, 400

Part Number: KGB-MB5505XPSTDX

Not Yet Reviewed

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King XP-Series Main Bearings MB 557XP 011

Main Bearing, XP-Series, Copper/Lead/Nickel, 0.011 in. Crankshaft Undersize, Chevy, Small Block, Set of 5

Part Number: KGB-MB557XP011

5.0 out of 5 stars ( 2 )

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King XP-Series Main Bearings MB 556XPN 010

Main Bearings, XP-Series, Narrowed, Tri-metal, 1/2 Groove Style, 0.010 in. Crankshaft Undersize, Chevrolet, Big Block, Set of 5

Part Number: KGB-MB556XPN010

Not Yet Reviewed

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King XP-Series Main Bearings MB 509XP

Main Bearings, XP-Series, Standard Size, Chevy, 400, Set of 5

Part Number: KGB-MB509XP

Not Yet Reviewed

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King XP-Series Main Bearings MB 557XP 001

Main Bearing, XP-Series, Copper/Lead/Nickel, 0.001 in. Crankshaft Undersize, Chevy, Small Block, Set of 5

Part Number: KGB-MB557XP001

1.0 out of 5 stars ( 1 )

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King XP-Series Main Bearings MB 556XPN 001

Main Bearings, XP-Series, Narrowed, Tri-metal, 1/2 Groove Style, 0.001 in. Crankshaft Undersize, Chevrolet, Big Block, Set of 5

Part Number: KGB-MB556XPN001

5.0 out of 5 stars ( 1 )

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King XP-Series Main Bearings MB5116XP 001

Main Bearings, HP-Series, Copper/Lead/Nickel, 0.001 in. Crankshaft Undersize, Chrysler, Dodge, Plymouth, 426, 440, Set 5

Part Number: KGB-MB5116XP001

5.0 out of 5 stars ( 1 )

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King XP-Series Main Bearings MB5505XP

Main Bearings, HP-Series, Copper/Lead/Nickel, Standard Size, Ford, 351W, 351M/400, Set of 5

Part Number: KGB-MB5505XP

Not Yet Reviewed

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King XP-Series Main Bearings MB5511XP STDX

Main Bearings, XP-Series, 1/2 Groove, Standard Size, Tri Metal, Pontiac V8, Set of 5

Part Number: KGB-MB5511XPSTDX

5.0 out of 5 stars ( 1 )

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King XP-Series Main Bearings MB 557XP 020

Main Bearing, XP-Series, Copper/Lead/Nickel, 0.020 in. Crankshaft Undersize, Chevy, Small Block, Set of 5

Part Number: KGB-MB557XP020

1.0 out of 5 stars ( 1 )

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King XP-Series Main Bearings MB5505XP 010

Main Bearings, XP-Series, Copper/Lead/Nickel, 0.010 in. Crankshaft Undersize, Ford, Lincoln, Mercury, 351W, 351M, 400

Part Number: KGB-MB5505XP010

5.0 out of 5 stars ( 1 )

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King XP-Series Main Bearings MB 529XP STDX

Main Bearings, XP-Series, Copper/Lead/Nickel, Standard Size, Ford, Lincoln, Mercury, Set of 5

Part Number: KGB-MB529XPSTDX

Not Yet Reviewed

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King XP-Series Main Bearings MB 509XP STDX

Main Bearings, XP-Series, Copper/Lead/Nickel, Standard Size, Chevy, 400, Set of 5

Part Number: KGB-MB509XPSTDX

Not Yet Reviewed

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King XP-Series Main Bearings MB 556XPN 010X

Main Bearings, XP Series, 1/2 Groove, .010 in. Crankshaft Undersize, Tri Metal, Chevrolet, 6.5, 6.6, 7.0, 7.4L, Set of 5

Part Number: KGB-MB556XPN010X

Not Yet Reviewed

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King XP-Series Main Bearings MB5168XP

Crankshaft Main Bearings set, Honda H22 50mm journal

Part Number: KGB-MB5168XP

Not Yet Reviewed

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King XP-Series Main Bearings MB 556XP 020

Main Bearings, XP-Series, Copper/Lead/Nickel, 0.020 in. Undersize, Chevy, Big Block, Set of 5

Part Number: KGB-MB556XP020

Not Yet Reviewed

Estimated Ship Date: Apr 6, 2026 if ordered today

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Estimated Ship Date: Apr 6, 2026 if ordered today

King XP-Series Main Bearings MB 529XP 001

Main Bearings, XP-Series, Copper/Lead/Nickel, 0.001 in. Crankshaft Undersize, Ford, Lincoln, Mercury, Set of 5

Part Number: KGB-MB529XP001

Not Yet Reviewed

Estimated Ship Date: Apr 6, 2026 if ordered today

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Estimated Ship Date: Apr 6, 2026 if ordered today

King XP-Series Main Bearings MB 556XP020X

Main Bearings, XP-Series, Copper/Lead/Nickel, 0.020 in. Undersize, Chevy, Big Block, Set of 5

Part Number: KGB-MB556XP020X

Not Yet Reviewed

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King XP-Series Main Bearings MB 509XP 010

Main Bearings, XP-Series, Copper/Lead/Nickel, 0.010 in. Crankshaft Undersize, Chevy, 400, Set of 5

Part Number: KGB-MB509XP010

Not Yet Reviewed

Estimated Ship Date: Apr 6, 2026 if ordered today

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Estimated Ship Date: Apr 6, 2026 if ordered today

King XP-Series Main Bearings MB5566XP STDX

Main Bearings, King XP-Series Main Bearings, Stock Size, Tri-Metal, Audi, Volkswagen, Sold as a Set of 5

Part Number: KGB-MB5566XPSTDX

Not Yet Reviewed

Estimated Ship Date: Apr 6, 2026 if ordered today

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Estimated Ship Date: Apr 6, 2026 if ordered today

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