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  • Engine Crankshaft Undersize (mm)
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King Engine Bearings

King SI-Series Main Bearings

4.02 out of 5 stars 85 Customer Reviews

King SI-Series main bearings are recommended for OE applications. These replacement bearings are designed for aftermarket gasoline or diesel engine rebuilding—and performance engines with factory crankshafts. The bearings have an improved crankshaft finish for reducing microscopic ferrite peaks on improperly ground or polished nodular cast iron crankshafts. King SI-Series main bearings feature improved oil clearance to reduce wear and increase engine life, which in turn reduces operating noise, vibration, and excess oil flow. Order the bearing set designed for fitment on your make and model.

Showing In Stock Items. Show All 165 Items.

Results 1 - 25 of 87

King SI-Series Main Bearings MB 557SI

King SI-Series Main Bearings MB 557SI

King SI-Series Main Bearings MB 557SI

Main Bearings, 1/2 Groove, Standard Size, Bi-metal, Silicon Aluminum, Chevy, Small Block, Set of 5

Part Number: KGB-MB557SI

4.0 out of 5 stars ( 9 )

Estimated Ship Date: Today

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King SI-Series Main Bearings MB 557SI 010

King SI-Series Main Bearings MB 557SI 010

King SI-Series Main Bearings MB 557SI 010

Main Bearings, 1/2 Groove, .010 in. Crankshaft Undersize, Bi-metal, Silicon Aluminum, Chevy, Small Block, Set of 5

Part Number: KGB-MB557SI010

4.67 out of 5 stars ( 6 )

Estimated Ship Date: Today

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King SI-Series Main Bearings MB 529SI

King SI-Series Main Bearings MB 529SI

King SI-Series Main Bearings MB 529SI

Main Bearings, 1/2 Groove, Standard Size, Bi-metal, Silicon Aluminum, Ford, Small Block, Set of 5

Part Number: KGB-MB529SI

4.25 out of 5 stars ( 4 )

Estimated Ship Date: Today

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King SI-Series Main Bearings MB 556SI

King SI-Series Main Bearings MB 556SI

King SI-Series Main Bearings MB 556SI

Main Bearings, 1/2 Groove, Standard Size, Bi-metal, Silicon Aluminumn, Chevy, Big Block, Set of 5

Part Number: KGB-MB556SI

3.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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King SI-Series Main Bearings MB 529SI 010

King SI-Series Main Bearings MB 529SI 010

King SI-Series Main Bearings MB 529SI 010

Main Bearings, 1/2 Groove, .010 in. Crankshaft Undersize, Bi-metal, Silicon Aluminum, Ford, Small Block, Set of 5

Part Number: KGB-MB529SI010

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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King SI-Series Main Bearings MB5650SI

King SI-Series Main Bearings MB5650SI

King SI-Series Main Bearings MB5650SI

Main Bearings, SI-Series, 1/2 Groove, Standard Size, Bi-metal, Silicon Aluminum, Ford, 429, 460, Set 5

Part Number: KGB-MB5650SI

Not Yet Reviewed

Estimated Ship Date: Today

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King SI-Series Main Bearings MB 510SI

King SI-Series Main Bearings MB 510SI

King SI-Series Main Bearings MB 510SI

Main Bearings, SI-Series, Silicon Aluminum, Standard Size, Chrysler, Dodge, Plymouth, 360, Set of 5

Part Number: KGB-MB510SI

3.33 out of 5 stars ( 3 )

Estimated Ship Date: Today

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King SI-Series Main Bearings MB5505SI

King SI-Series Main Bearings MB5505SI

King SI-Series Main Bearings MB5505SI

Main Bearings, 1/2 Groove, Standard Size, Bi-metal, Silicon Aluminum, Ford, Small Block, Modified, Set of 5

Part Number: KGB-MB5505SI

3.4 out of 5 stars ( 5 )

Estimated Ship Date: Today

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King SI-Series Main Bearings MB 556SI 010

King SI-Series Main Bearings MB 556SI 010

King SI-Series Main Bearings MB 556SI 010

Main Bearings, 1/2 Groove, .010 in. Crankshaft Undersize, Bi-metal, Silicon Aluminum, Chevy, Big Block, Set of 5

Part Number: KGB-MB556SI010

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Today

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King SI-Series Main Bearings MB7009SI

King SI-Series Main Bearings MB7009SI

King SI-Series Main Bearings MB7009SI

Main Bearings, SI-Series, Standard Size, Bi-metal, Silicon Aluminum, Dodge, 5.9, Diesel, Set of 7

Part Number: KGB-MB7009SI

Not Yet Reviewed

Estimated Ship Date: Today

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King SI-Series Main Bearings MB5505SI 010

King SI-Series Main Bearings MB5505SI 010

King SI-Series Main Bearings MB5505SI 010

Main Bearings, 1/2 Groove, .010 in. Crankshaft Undersize, Bi-metal, Silicon Aluminum, Ford, Set of 5

Part Number: KGB-MB5505SI010

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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King SI-Series Main Bearings MB 557SI 020

King SI-Series Main Bearings MB 557SI 020

King SI-Series Main Bearings MB 557SI 020

Main Bearings, 1/2 Groove, .020 in. Crankshaft Undersize, Bi-metal, Silicon Aluminum, Chevy, Small Block, Set of 5

Part Number: KGB-MB557SI020

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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King SI-Series Main Bearings MB 557SI 001

King SI-Series Main Bearings MB 557SI 001

King SI-Series Main Bearings MB 557SI 001

Main Bearings, 1/2 Groove, .001 in. Crankshaft Undersize, Bi-metal, Silicon Aluminum, Chevy, Small Block, Set of 5

Part Number: KGB-MB557SI001

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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King SI-Series Main Bearings MB5534SI

King SI-Series Main Bearings MB5534SI

King SI-Series Main Bearings MB5534SI

Main Bearings, SI-Series, Full Groove, Standard Size, Bi-metal, Silicon Aluminum, Jeep, Mopar, Set of 5

Part Number: KGB-MB5534SI

4.5 out of 5 stars ( 4 )

Estimated Ship Date: Today

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King SI-Series Main Bearings MB 557SI 030

King SI-Series Main Bearings MB 557SI 030

King SI-Series Main Bearings MB 557SI 030

Main Bearings, 1/2 Groove, .030 in. Crankshaft Undersize, Bi-metal, Silicon Aluminum, Chevy, Small Block, Set of 5

Part Number: KGB-MB557SI030

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

King SI-Series Main Bearings MB 556SI 020

King SI-Series Main Bearings MB 556SI 020

King SI-Series Main Bearings MB 556SI 020

Main Bearings, 1/2 Groove, .020 in. Crankshaft Undersize, Bi-metal, Silicon Aluminum, Chevy, Big Block, Set of 5

Part Number: KGB-MB556SI020

2.33 out of 5 stars ( 3 )

Estimated Ship Date: Today

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King SI-Series Main Bearings MB5650SI 010

King SI-Series Main Bearings MB5650SI 010

King SI-Series Main Bearings MB5650SI 010

Main Bearing, HP-Series, Silicon Aluminum, 0.010 in. Crankshaft Undersize, Ford, 429, 460, Set of 5

Part Number: KGB-MB5650SI010

Not Yet Reviewed

Estimated Ship Date: Today

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King SI-Series Main Bearings MB 517SI 010

King SI-Series Main Bearings MB 517SI 010

King SI-Series Main Bearings MB 517SI 010

Main Bearings, SI-Series, 1/2 Groove, .010 in. Crankshaft Undersize, Bi-metal, Aluminum Silicon, Jeep, Chrysler, Set of 5

Part Number: KGB-MB517SI010

Not Yet Reviewed

Estimated Ship Date: Today

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King SI-Series Main Bearings MB 556SI 001

King SI-Series Main Bearings MB 556SI 001

King SI-Series Main Bearings MB 556SI 001

Main Bearings, 1/2 Groove, .001 in. Crankshaft Undersize, Bi-metal, Silicon Aluminum, Chevy, Big Block, Set of 5

Part Number: KGB-MB556SI001

Not Yet Reviewed

Estimated Ship Date: Today

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King SI-Series Main Bearings MB 556SI 030

King SI-Series Main Bearings MB 556SI 030

King SI-Series Main Bearings MB 556SI 030

Main Bearings, 1/2 Groove, .030 in. Crankshaft Undersize, Bi-metal, Silicon Aluminum, Chevy, Big Block, Set of 5

Part Number: KGB-MB556SI030

Not Yet Reviewed

Estimated Ship Date: Today

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King SI-Series Main Bearings MB 557SI 040

King SI-Series Main Bearings MB 557SI 040

King SI-Series Main Bearings MB 557SI 040

Main Bearings, 1/2 Groove, .040 in. Crankshaft Undersize, Bi-metal, Silicon Aluminum, Chevy, Small Block, Set of 5

Part Number: KGB-MB557SI040

Not Yet Reviewed

Estimated Ship Date: Today

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Estimated Ship Date: Today

King SI-Series Main Bearings MB5570SI 010

King SI-Series Main Bearings MB5570SI 010

King SI-Series Main Bearings MB5570SI 010

Main Bearings, 1/2 Groove, .010 in. Crankshaft Undersize, Bi-metal, Silicon Aluminum, Chevy, Small Block, Set of 5

Part Number: KGB-MB5570SI010

Not Yet Reviewed

Estimated Ship Date: Today

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King SI-Series Main Bearings MB 529SI 020

King SI-Series Main Bearings MB 529SI 020

King SI-Series Main Bearings MB 529SI 020

Main Bearings, 1/2 Groove, .020 in. Crankshaft Undersize, Bi-metal, Silicon Aluminum, Ford, Small Block, Set of 5

Part Number: KGB-MB529SI020

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

King SI-Series Main Bearings MB5534SI 010

King SI-Series Main Bearings MB5534SI 010

King SI-Series Main Bearings MB5534SI 010

Main Bearings, SI-Series, Full Groove, .010 in. Crankshaft Undersize, Bi-metal, Silicon Aluminum, Jeep, Mopar, Set of 5

Part Number: KGB-MB5534SI010

Not Yet Reviewed

Estimated Ship Date: Today

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Estimated Ship Date: Today

King SI-Series Main Bearings MB5534SI 020

King SI-Series Main Bearings MB5534SI 020

King SI-Series Main Bearings MB5534SI 020

Main Bearings, SI-Series, Full Groove, .020 in. Crankshaft Undersize, Bi-metal, Silicon Aluminum, Jeep, Mopar, Set of 5

Part Number: KGB-MB5534SI020

Not Yet Reviewed

Estimated Ship Date: Today

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