King XP-Series Main Bearings

4.44 out of 5 stars 45 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 )

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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Estimated Ship Date: Monday 3/30/2026 if shipped by air

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 )

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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Estimated Ship Date: Monday 3/30/2026 if shipped by air

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

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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Estimated Ship Date: Monday 3/30/2026 if shipped by air

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

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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Estimated Ship Date: Monday 3/30/2026 if shipped by air

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 )

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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Estimated Ship Date: Monday 3/30/2026 if shipped by air

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

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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Estimated Ship Date: Monday 3/30/2026 if shipped by air

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 )

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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Estimated Ship Date: Monday 3/30/2026 if shipped by air

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 )

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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Estimated Ship Date: Monday 3/30/2026 if shipped by air

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

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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Estimated Ship Date: Monday 3/30/2026 if shipped by air

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

Estimated Ship Date: Jun 23, 2026 if ordered today

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Estimated Ship Date: Jun 23, 2026 if ordered today

Need It Sooner? We recommend these similar substitute parts:

ACL Direct Replacement Main Bearing Sets 5M590P-01

Not Yet Reviewed

Estimated Ship Date: Monday 3/30/2026

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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

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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Estimated Ship Date: Monday 3/30/2026 if shipped by air

King XP-Series Main Bearings MB4104XP STDX

Main Bearings, XP-Series, Copper/Lead/Nickel, Standard Size, Nissan, 3.0L, Set of 6

Part Number: KGB-MB4104XPSTDX

Not Yet Reviewed

Estimated Ship Date: Jun 23, 2026 if ordered today

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Estimated Ship Date: Jun 23, 2026 if ordered today

King XP-Series Main Bearings MB 556XPN 020

Main Bearings, XP-Series, Narrowed, Tri-metal, 1/2 Groove Style, 0.020 in. Crankshaft Undersize, Chevrolet, Big Block, Set of 5

Part Number: KGB-MB556XPN020

Not Yet Reviewed

Estimated Ship Date: Jun 23, 2026 if ordered today

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Estimated Ship Date: Jun 23, 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: Monday 3/30/2026 if shipped by air

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Estimated Ship Date: Monday 3/30/2026 if shipped by air

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: Jun 24, 2026 if ordered today

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Estimated Ship Date: Jun 24, 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

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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Estimated Ship Date: Monday 3/30/2026 if shipped by air

King XP-Series Main Bearings MB 557XP020X

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

Part Number: KGB-MB557XP020X

Not Yet Reviewed

Estimated Ship Date: Jun 23, 2026 if ordered today

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Estimated Ship Date: Jun 23, 2026 if ordered today

King XP-Series Main Bearings MB5527XP.026

Main Bearings, King XP-Series Main Bearings, .001 in., .026 mm Crankshaft Undersize, Tri-Metal, Toyota, Sold as a Set of 5

Part Number: KGB-MB5527XP026

Not Yet Reviewed

Estimated Ship Date: Jun 23, 2026 if ordered today

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Estimated Ship Date: Jun 23, 2026 if ordered today

King XP-Series Main Bearings MB5527XP0.5

Main Bearings, XP-Series, Copper/Lead/Nickel, 0.50mm. Crankshaft Undersize, Toyota, 1.5, 1.6, 1.8L, Set of 5

Part Number: KGB-MB5527XP05

Not Yet Reviewed

Estimated Ship Date: Jun 24, 2026 if ordered today

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Estimated Ship Date: Jun 24, 2026 if ordered today

King XP-Series Main Bearings MB5527XP0.25

Main Bearings, XP-Series, Copper/Lead/Nickel, 0.25mm. Crankshaft Undersize, Toyota, 1.5, 1.6, 1.8L, Set of 5

Part Number: KGB-MB5527XP025

Not Yet Reviewed

Estimated Ship Date: Jun 22, 2026 if ordered today

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Estimated Ship Date: Jun 22, 2026 if ordered today

King XP-Series Main Bearings MB4104XP.026

Main Bearings, King XP-Series Main Bearings, .001 in., .026 mm Crankshaft Undersize, Tri-Metal, for Nissan, Sold as a Set of 4

Part Number: KGB-MB4104XP026

Not Yet Reviewed

Estimated Ship Date: Jun 22, 2026 if ordered today

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Estimated Ship Date: Jun 22, 2026 if ordered today

King XP-Series Main Bearings MB5168XP.026

Main Bearings, XP-Series, Performance, Tri-Metal, 0.026mm Crankshaft Undersize, Set of 5

Part Number: KGB-MB5168XP026

Not Yet Reviewed

Estimated Ship Date: Jun 23, 2026 if ordered today

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Estimated Ship Date: Jun 23, 2026 if ordered today

King XP-Series Main Bearings MB 529XP 020

Main Bearings, King XP-Sereis Main Bearings, .020 in., Crankshaft Undersize, Tri-Metal, Ford, Sold as a Set of 5

Part Number: KGB-MB529XP020

Not Yet Reviewed

Estimated Ship Date: Jun 23, 2026 if ordered today

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Estimated Ship Date: Jun 23, 2026 if ordered today

King XP-Series Main Bearings MB5232XP STDX

Main Bearings, XP-Series, Copper/Lead/Nickel, Standard Size, Nissan, 1.8, 2.0L, Set of 5

Part Number: KGB-MB5232XPSTDX

Not Yet Reviewed

Estimated Ship Date: Jun 23, 2026 if ordered today

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Estimated Ship Date: Jun 23, 2026 if ordered today

King XP-Series Main Bearings MB5209XP0.25

Main Bearings, XP-Series, Copper/Lead/Nickel, 0.25mm. Crankshaft Undersize, Mitsubishi, 1.6, 1.8, 2.0, 2.4L, Set of 5

Part Number: KGB-MB5209XP025

Not Yet Reviewed

Estimated Ship Date: Jun 24, 2026 if ordered today

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Estimated Ship Date: Jun 24, 2026 if ordered today

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