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King Engine Bearings

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
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 performance with a high-load capacity. These race-only Xtreme Performance (XP-Series) Tri-Lecular main bearings are proven track-tough to handle the ground-shaking power of your race engine. Hundreds of sets are available; order the bearings recommended for your vehicle.

Showing In Stock Items. Show All 16 Items.

Results 1 - 10 of 10

King XP-Series Main Bearings MB 557XP

King XP-Series Main Bearings MB 557XP

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: Today

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Estimated Ship Date: Today

King XP-Series Main Bearings MB 557XPSTDX

King XP-Series Main Bearings MB 557XPSTDX

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: Today

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King XP-Series Main Bearings MB 557XP 010

King XP-Series Main Bearings MB 557XP 010

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: Today

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King XP-Series Main Bearings MB 509XP

King XP-Series Main Bearings MB 509XP

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

Estimated Ship Date: Today

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King XP-Series Main Bearings MB 557XP 001

King XP-Series Main Bearings MB 557XP 001

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: Today

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King XP-Series Main Bearings MB 557XP 020

King XP-Series Main Bearings MB 557XP 020

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: Today

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King XP-Series Main Bearings MB5511XP STDX

King XP-Series Main Bearings MB5511XP STDX

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: Today

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King XP-Series Main Bearings MB 557XP 011

King XP-Series Main Bearings MB 557XP 011

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: Today

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Estimated Ship Date: Today

King XP-Series Main Bearings MB5511XP

King XP-Series Main Bearings MB5511XP

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: May 4, 2026 if ordered today

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Estimated Ship Date: May 4, 2026 if ordered today

King XP-Series Main Bearings MB 509XP 010

King XP-Series Main Bearings MB 509XP 010

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: May 4, 2026 if ordered today

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Estimated Ship Date: May 4, 2026 if ordered today

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