1978 Main Bearings

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

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

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

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

Part Number: KGB-MB557SISTDX

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Main Bearings, 1/2 Groove, .002 in. Crankshaft Undersize, Bi Metal, Jeep, 2.5, 3.8, 4.0, 4.2L, Pair

Part Number: CWA-J8133682

Not Yet Reviewed

Estimated Ship Date: Today

Main Bearings, AM-Series, Alecular Silicon, 0.25mm Crankshaft Undersize, Toyota, 2.2, 2.4L, Set of 5

Part Number: KGB-MB506AM025

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Estimated Ship Date: Jun 23, 2026 if ordered today

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Main Bearings, 1/2 Groove, .020 in. Crankshaft Undersize, Bi-metal, Silicon Aluminum, GM V6, Set of 5

Part Number: KGB-MB445SI020

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Jun 22, 2026 if ordered today

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Main Bearings, 1/2 Groove, .010 in. Crankshaft Undersize, Bi-metal, Silicon Aluminum, GM V6, Set of 5

Part Number: KGB-MB445SI010

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Estimated Ship Date: Today

Main Bearings, 1/2 Groove, Standard Size, Bi-metal, Silicon Aluminum, GM V6, Set of 5

Part Number: KGB-MB445SI

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Estimated Ship Date: Jun 23, 2026 if ordered today

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Main Bearing,

Part Number: CWA-J8133255

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Estimated Ship Date: Jun 18, 2026 if ordered today

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Main Bearings, Aluglide, A-Series, Grooved, Bi-Metal, 0.02 in./0.50mm Undersize Crankshaft, Chevy, Excalibur, 6.5L, 6.6L, 7.0L, 7.4L, Set of 5

Part Number: PEB-5M829A-20

Not Yet Reviewed

Estimated Ship Date: Today

Main Bearings, AM-Series, 1/2 Groove, Standard Size, Bi Metal, Toyota, 2.2, 2.4L, Set of 5

Part Number: KGB-MB506AM

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Estimated Ship Date: Today

Main Bearings, Aluglide, A-Series, Grooved, Bi-Metal Design, 0.01 in./0.25mm Undersize Crankshaft, Chrysler, Dodge, Plymouth, 3.7L, Set of 4

Part Number: PEB-4M1419AL-10

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Estimated Ship Date: Today

Main Bearings, 1/2 Groove, .030 in. Undersize, Bi-metal, Silicon Aluminum, Ford, Set of 5

Part Number: KGB-MB5512SI030

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Estimated Ship Date: Jun 24, 2026 if ordered today

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

Part Number: KGB-MB5512SI020

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Estimated Ship Date: Jun 24, 2026 if ordered today

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Main Bearings, 1/2 Groove, .060 in. Undersize, Bi-metal, Silicon Aluminum, Ford, Set of 5

Part Number: KGB-MB5512SI060

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Estimated Ship Date: Jun 24, 2026 if ordered today

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Main Bearings, AM-Series, 1/2 Groove, .040 in. Undersize, Bi Metal, Ford, Reliant, 2.8L, Set of 4

Part Number: KGB-MB435AM040

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Estimated Ship Date: Jun 24, 2026 if ordered today

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Main Bearings, SI-Series, .030 in. Undersize, Bi-metal, Silicon Aluminum, Ford, 240, 250, 300, Set of 7

Part Number: KGB-MB760SI030

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Estimated Ship Date: Jun 24, 2026 if ordered today

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Main Bearings, AM-Series, 1/2 Groove, .020 in. Undersize, Bi Metal, Ford, Reliant, 2.8L, Set of 4

Part Number: KGB-MB435AM020

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Estimated Ship Date: Jun 24, 2026 if ordered today

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Main Bearings, AM-Series, 1/2 Groove, .060 in. Undersize, Bi Metal, Buick, 3.0, 3.2, 3.8, 3.8L, Set of 4

Part Number: KGB-MB443AM060

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Estimated Ship Date: Jun 24, 2026 if ordered today

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Main Bearings, AM-Series, 1/2 Groove, .050 in. Undersize, Bi Metal, Buick, 3.0, 3.2, 3.8, 3.8L, Set of 4

Part Number: KGB-MB443AM050

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Estimated Ship Date: Jun 24, 2026 if ordered today

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Main Bearings, AM-Series, 1/2 Groove, .030 in. Undersize, Bi Metal, Ford, Reliant, 2.8L, Set of 4

Part Number: KGB-MB435AM030

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Estimated Ship Date: Jun 24, 2026 if ordered today

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Main Bearings, 1/2 Groove, .040 in. Undersize, Bi-metal, Silicon Aluminum, Ford, Set of 5

Part Number: KGB-MB5512SI040

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Estimated Ship Date: Jun 24, 2026 if ordered today

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Main Bearings, SI-Series, .060 in. Undersize, Bi-metal, Silicon Aluminum, Ford, 240, 250, 300, Set of 7

Part Number: KGB-MB760SI060

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Estimated Ship Date: Jun 24, 2026 if ordered today

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