King XP-Series Main Bearings

4.42 out of 5 stars 43 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 MB5013XP

Main Bearings, XP-Series, Standard, Tri Metal, Buick, Cadillac, Chevy, GMC, Hummer, Pontiac, Saab, V8, Set

Part Number: KGB-MB5013XP

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Monday 9/29/2025

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Estimated Ship Date: Monday 9/29/2025

King XP-Series Main Bearings MB5013XP STDX

Main Bearings, XP-Series, Copper/Lead/Nickel, Standard Size, Chevy, 4.8, 5.3, 5.7, 6.0L, Set

Part Number: KGB-MB5013XPSTDX

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 9/29/2025

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Estimated Ship Date: Monday 9/29/2025

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 9/29/2025

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Estimated Ship Date: Monday 9/29/2025

King XP-Series Main Bearings MB5013XP 010

Main Bearings, XP-Series, Copper/Lead/Nickel, 0.010 in. Crankshaft Undersize, Chevy, 4.8, 5.3, 5.7, 6.0L, Set

Part Number: KGB-MB5013XP010

4.5 out of 5 stars ( 2 )

Estimated Ship Date: Monday 9/29/2025

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Estimated Ship Date: Monday 9/29/2025

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

Estimated Ship Date: Monday 9/29/2025

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Estimated Ship Date: Monday 9/29/2025

King XP-Series Main Bearings MB5777XP

Main Bearings, XP-Series, Performance, Tri-Metal, Dart LS Next, Set of 5

Part Number: KGB-MB5777XP

Not Yet Reviewed

Estimated Ship Date: Monday 9/29/2025

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Estimated Ship Date: Monday 9/29/2025

King XP-Series Main Bearings MB5013XP 001

Main Bearings, XP-Series, Copper/Lead/Nickel, 0.001 in. Crankshaft Undersize, Chevy, 4.8, 5.3, 5.7, 6.0L, Set

Part Number: KGB-MB5013XP001

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 9/29/2025

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Estimated Ship Date: Monday 9/29/2025

King XP-Series Main Bearings MB5013XP 010X

Main Bearings, XP-Series, Copper/Lead/Nickel, 0.010 in. Crankshaft Undersize, Chevy, 4.8, 5.3, 5.7, 6.0L, Set

Part Number: KGB-MB5013XP010X

3.5 out of 5 stars ( 2 )

Estimated Ship Date: Monday 9/29/2025

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Estimated Ship Date: Monday 9/29/2025

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 9/29/2025

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Estimated Ship Date: Monday 9/29/2025

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 )

Estimated Ship Date: Monday 9/29/2025

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Estimated Ship Date: Monday 9/29/2025

King XP-Series Main Bearings MB5013XP 011

Main Bearings, XP-Series, Copper/Lead/Nickel, 0.011 in. Crankshaft Undersize, Chevy, 4.8, 5.3, 5.7, 6.0L, Set

Part Number: KGB-MB5013XP011

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 9/29/2025

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Estimated Ship Date: Monday 9/29/2025

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 9/29/2025

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Estimated Ship Date: Monday 9/29/2025

King XP-Series Main Bearings MB 556XPN 030

Main Bearings, XP-Series, Narrowed, Tri-metal, 1/2 Groove Style, 0.030 in. Crankshaft Undersize, Chevrolet, Big Block, Set of 5

Part Number: KGB-MB556XPN030

Not Yet Reviewed

Estimated Ship Date: Monday 9/29/2025

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Estimated Ship Date: Monday 9/29/2025

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 9/29/2025

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Estimated Ship Date: Monday 9/29/2025

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 9/29/2025

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Estimated Ship Date: Monday 9/29/2025

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 9/29/2025

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Estimated Ship Date: Monday 9/29/2025

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 9/29/2025

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Estimated Ship Date: Monday 9/29/2025

King XP-Series Main Bearings MB5777XP STDX

Main Bearings, XP-Series, Performance, .001 Extra Clearance, Tri-Metal, Dart LS Next, Set of 5

Part Number: KGB-MB5777XPSTDX

Not Yet Reviewed

Estimated Ship Date: Dec 29, 2025 if ordered today

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Estimated Ship Date: Dec 29, 2025 if ordered today

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 )

Estimated Ship Date: Monday 9/29/2025

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Estimated Ship Date: Monday 9/29/2025

King XP-Series Main Bearings MB5013XP 020

Main Bearings, XP-Series, Copper/Lead/Nickel, 0.020 in. Crankshaft Undersize, Chevy, 4.8, 5.3, 5.7, 6.0L, Set

Part Number: KGB-MB5013XP020

Not Yet Reviewed

Estimated Ship Date: Monday 9/29/2025

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Estimated Ship Date: Monday 9/29/2025

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 )

Estimated Ship Date: Monday 9/29/2025

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Estimated Ship Date: Monday 9/29/2025

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: Dec 29, 2025 if ordered today

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Estimated Ship Date: Dec 29, 2025 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: Dec 23, 2025 if ordered today

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Estimated Ship Date: Dec 23, 2025 if ordered today

King XP-Series Main Bearings MB5511XP

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

Part Number: KGB-MB5511XP

Not Yet Reviewed

Estimated Ship Date: Dec 29, 2025 if ordered today

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Estimated Ship Date: Dec 29, 2025 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: Dec 29, 2025 if ordered today

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Estimated Ship Date: Dec 29, 2025 if ordered today

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