$25 Off $250 / $50 Off $500, on Summit Racing Brand Products - Use Promo Code: BUILDIT

$25 Off $250 / $50 Off $500, on Summit Racing Brand Products - Use Promo Code: BUILDIT

Summit Racing SpeedCard - learn how to get 10% back - Get Details!

Filters

  • In Stock
  • Make/Model
  • Make/Engine
  • Engine Crankshaft Undersize (in.)
  • Engine Crankshaft Undersize (mm)
  • Grooved Bearing
  • Groove Location
  • Groove Style
  • Quantity
  • Filter Options

Selected Filters

Filter Results by Vehicle

Loading...

Availability

  • Filters

  • Make/Model
  • Make/Engine
  • Engine Crankshaft Undersize (in.)
  • Engine Crankshaft Undersize (mm)
  • Grooved Bearing
  • Groove Location
  • Groove Style
  • Quantity
  • Filter Options
King Engine Bearings

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
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 23 Items.

Results 1 - 17 of 17

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

...Loading

Estimated Ship Date: Today

King XP-Series Main Bearings MB 556XPN

King XP-Series Main Bearings MB 556XPN

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: Today

...Loading

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

...Loading

Estimated Ship Date: Today

King XP-Series Main Bearings MB 556XPN STDX

King XP-Series Main Bearings MB 556XPN STDX

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: Today

...Loading

Estimated Ship Date: Today

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

...Loading

Estimated Ship Date: Today

King XP-Series Main Bearings MB 556XPN 010

King XP-Series Main Bearings MB 556XPN 010

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: Today

...Loading

Estimated Ship Date: Today

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

...Loading

Estimated Ship Date: Today

King XP-Series Main Bearings MB 556XPN 001

King XP-Series Main Bearings MB 556XPN 001

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: Today

...Loading

Estimated Ship Date: Today

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

...Loading

Estimated Ship Date: Today

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

...Loading

Estimated Ship Date: Today

King XP-Series Main Bearings MB1328XP

King XP-Series Main Bearings MB1328XP

King XP-Series Main Bearings MB1328XP

Main Bearings, XP-Series, Standard, Tri Metal Copper-Lead Nickel, Chevrolet, 4.8, 5.3, 6.0, 6.2L, Thrust Bearing Only, Pair

Part Number: KGB-MB1328XP

Not Yet Reviewed

Estimated Ship Date: Today

...Loading

Estimated Ship Date: Today

King XP-Series Main Bearings MB 509XP STDX

King XP-Series Main Bearings MB 509XP STDX

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

Estimated Ship Date: Today

...Loading

Estimated Ship Date: Today

King XP-Series Main Bearings MB1328XP STDX

King XP-Series Main Bearings MB1328XP STDX

King XP-Series Main Bearings MB1328XP STDX

Main Bearings, King XP-Series Coated Main Bearings, Stock Size, Tri-Metal, Chevy, Each

Part Number: KGB-MB1328XPSTDX

Not Yet Reviewed

Estimated Ship Date: Today

...Loading

Estimated Ship Date: 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: Mar 16, 2026 if ordered today

...Loading

Estimated Ship Date: Mar 16, 2026 if ordered today

King XP-Series Main Bearings MB 509XP 010X

King XP-Series Main Bearings MB 509XP 010X

King XP-Series Main Bearings MB 509XP 010X

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

Part Number: KGB-MB509XP010X

Not Yet Reviewed

Estimated Ship Date: Mar 16, 2026 if ordered today

...Loading

Estimated Ship Date: Mar 16, 2026 if ordered today

King XP-Series Main Bearings MB 554XP 001

King XP-Series Main Bearings MB 554XP 001

King XP-Series Main Bearings MB 554XP 001

Main Bearings, XP-Series, Copper/Lead/Nickel, 0.001 in. Crankshaft Undersize, Chevy, 265, 283, 302, 327, Set of 5

Part Number: KGB-MB554XP001

Not Yet Reviewed

Estimated Ship Date: Mar 16, 2026 if ordered today

...Loading

Estimated Ship Date: Mar 16, 2026 if ordered today

King XP-Series Main Bearings MB 556XPN 020

King XP-Series Main Bearings MB 556XPN 020

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: Mar 16, 2026 if ordered today

...Loading

Estimated Ship Date: Mar 16, 2026 if ordered today

  • 1
  • Page 1 of 1

Modal Header

Call To Order

This is a custom order part. You can order this part by Contacting Us.

Summit Racing Speedcard. Synchrony Car Care.

Summit Racing Equipment SpeedCard

Jumpstart Your Next Project!

View Details|See if you Prequalify