King AM-Series Main Bearings

4.24 out of 5 stars 33 Customer Reviews

King AM-Series main bearings are recommended for street or marine applications. These crankshaft bearings have superior embeddability, which provides greater macro-particle to reduce scratching of the crank journals and tearing or weakening of the Babbitt overlays. King AM-Series main bearings feature tolerance control to within plus or minus .0001—and they're lead-free, making them environmentally-friendly and user-safe. Hundreds of performance sets are available; order the replacement bearings designed to fit your vehicle.

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King AM-Series Main Bearings MB 582AM0.25

Main Bearings, AM-Series, Full Groove, Alecular Silicon, 0.25mm. Crankshaft Undersize, Ford, 2.0L, 2.3L, Set of 5

Part Number: KGB-MB582AM025

Not Yet Reviewed

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King AM-Series Main Bearings MB5278AM

Main Bearings, AM-Series, 3/4 Groove, Standard Size, Bi Metal, Ford, 2.3, 2.5L, Set of 5

Part Number: KGB-MB5278AM

3.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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King AM-Series Main Bearings MB5278AM0.25

Main Bearings, AM-Series, Alecular Silicon, 0.25mm Crankshaft Undersize, Ford, 2.3, 2.5L, Set of 5

Part Number: KGB-MB5278AM025

5.0 out of 5 stars ( 1 )

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King AM-Series Main Bearings MB5527AM

Main Bearings, AM-Series, 1/2 Groove, Standard Size, Bi Metal, Toyota, 1.5, 1.6, 1.8L, Set of 5

Part Number: KGB-MB5527AM

Not Yet Reviewed

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King AM-Series Main Bearings MB5278AM0.5

Main Bearings, AM-Series, Alecular Silicon, 0.50mm Crankshaft Undersize, Ford, 2.3, 2.5L, Set of 5

Part Number: KGB-MB5278AM05

Not Yet Reviewed

Estimated Ship Date: Jun 23, 2026 if ordered today

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Estimated Ship Date: Jun 23, 2026 if ordered today

King AM-Series Main Bearings MB5278AM0.75

Main Bearings, AM-Series, Alecular Silicon, 0.75mm Crankshaft Undersize, Ford, 2.3, 2.5L, Set of 5

Part Number: KGB-MB5278AM075

Not Yet Reviewed

Estimated Ship Date: Jun 24, 2026 if ordered today

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Estimated Ship Date: Jun 24, 2026 if ordered today

King AM-Series Main Bearings MB5547AM 010

Main Bearings, AM-Series, 1/2 Groove, .010 in. Crankshaft Undersize, Bi Metal, Ford, 2.3, 2.5L, Set of 5

Part Number: KGB-MB5547AM010

Not Yet Reviewed

Estimated Ship Date: Jun 24, 2026 if ordered today

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Estimated Ship Date: Jun 24, 2026 if ordered today

King AM-Series Main Bearings MB5587AM0.5

Main Bearing, AM-Series, Alecular Silicon, 0.50mm. Crankshaft Undersize, Suzuki, 1.6L, Set of 5

Part Number: KGB-MB5587AM05

Not Yet Reviewed

Estimated Ship Date: Jun 23, 2026 if ordered today

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Estimated Ship Date: Jun 23, 2026 if ordered today

King AM-Series Main Bearings for 1990-1995 SAMURAI, 1989-1997 SWIFT - MB5556AM

Main Bearings, AM-Series, 1/2 Groove, Standard Size, Bi Metal, Suzuki, 1.3L, Set of 5

Part Number: KGB-MB5556AM

Not Yet Reviewed

Estimated Ship Date: Jun 22, 2026 if ordered today

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Estimated Ship Date: Jun 22, 2026 if ordered today

King AM-Series Main Bearings for 1985-1995 4RUNNER, 1983-1985 CELICA, 1984-1995 PICKUP - MB 506AM0.75

Main Bearings, AM-Series, Alecular Silicon, 0.75mm Crankshaft Undersize, Toyota, 2.2, 2.4L, Set of 5

Part Number: KGB-MB506AM075

Not Yet Reviewed

Estimated Ship Date: Jun 23, 2026 if ordered today

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Estimated Ship Date: Jun 23, 2026 if ordered today

King AM-Series Main Bearings MB 580AM0.25

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

Part Number: KGB-MB580AM025

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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King AM-Series Main Bearings MB5089AM

Main Bearings, AM-Series, 1/2 Groove, Standard Size, Bi Metal, Toyota, 2.0, 2.4, 2.7L, Set of 5

Part Number: KGB-MB5089AM

Not Yet Reviewed

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King AM-Series Main Bearings MB5245AM0.25

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

Part Number: KGB-MB5245AM025

Not Yet Reviewed

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King AM-Series Main Bearings MB5089AM0.25

Main Bearings, AM-Series, Alecular Silicon, 0.25mm Crankshaft Undersize, Toyota, 2.0, 2.4, 2.7L, Set of 5

Part Number: KGB-MB5089AM025

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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King AM-Series Main Bearings MB5245AM

Main Bearings, AM-Series, 1/2 Groove, Standard Size, Bi Metal, for Nissan, 2.4L, Set 5

Part Number: KGB-MB5245AM

Not Yet Reviewed

Estimated Ship Date: Today

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King AM-Series Main Bearings MB4012AM

Main Bearings, 1/2 Groove, Standard Size, Bi Metal, Alecular Alloy, Set of 4

Part Number: KGB-MB4012AM

Not Yet Reviewed

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King AM-Series Main Bearings MB5259AM0.25

Main Bearings, AM-Series, Alecular Silicon, 0.25mm Crankshaft Undersize, for use on Acura®, Honda®, Set of 5

Part Number: KGB-MB5259AM025

Not Yet Reviewed

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King AM-Series Main Bearings MB5168AM

Main Bearings, AM-Series, Full Groove, Standard Size, Bi Metal, for use on Acura®, Honda®, Set of 5

Part Number: KGB-MB5168AM

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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King AM-Series Main Bearings MB5304AM0.25

Main Bearings, AM-Series, Alecular Silicon, 0.25mm Crankshaft Undersize, Ford, Kia, Mazda, Mercury, Set of 5

Part Number: KGB-MB5304AM025

Not Yet Reviewed

Estimated Ship Date: Jun 22, 2026 if ordered today

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Estimated Ship Date: Jun 22, 2026 if ordered today

King AM-Series Main Bearings MB 458AM

Main Bearings, 3/4 Groove, Standard Size, Bi Metal, Alecular Alloy, Set of 4

Part Number: KGB-MB458AM

Not Yet Reviewed

Estimated Ship Date: Jun 22, 2026 if ordered today

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Estimated Ship Date: Jun 22, 2026 if ordered today

King AM-Series Main Bearings for 1988-1995 CIVIC, 1993-1995 CIVIC DEL SOL, 1988-1991 CRX - MB5244AM0.25

Main Bearings, AM-Series, Alecular Silicon, 0.25mm Crankshaft Undersize, for use on Honda®, 1.3, 1.5L, Set of 5

Part Number: KGB-MB5244AM025

Not Yet Reviewed

Estimated Ship Date: Jun 22, 2026 if ordered today

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Estimated Ship Date: Jun 22, 2026 if ordered today

King AM-Series Main Bearings MB 496AM0.25

Main Bearings, AM-Series, Alecular Silicon, 0.25mm Crankshaft Undersize, Mazda, 1.8, 2.3, 2.5, 3.0L, Set of 4

Part Number: KGB-MB496AM025

Not Yet Reviewed

Estimated Ship Date: Jun 22, 2026 if ordered today

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Estimated Ship Date: Jun 22, 2026 if ordered today

King AM-Series Main Bearings MB4050AM0.25

Main Bearings, AM-Series, Alecular Silicon, 0.25mm Crankshaft Undersize, Kia, Mitsubishi, Set of 4

Part Number: KGB-MB4050AM025

Not Yet Reviewed

Estimated Ship Date: Jun 22, 2026 if ordered today

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Estimated Ship Date: Jun 22, 2026 if ordered today

King AM-Series Main Bearings MB5171AM0.75

Main Bearings, AM-Series, Alecular Silicon, 0.75mm Crankshaft Undersize, Mazda, 1.8, 2.0L, Set of 5

Part Number: KGB-MB5171AM075

Not Yet Reviewed

Estimated Ship Date: Jun 22, 2026 if ordered today

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Estimated Ship Date: Jun 22, 2026 if ordered today

King AM-Series Main Bearings MB5595AM

Main Bearings, King AM-Series Main Bearings, Stock Size, Alecular Silicon, Datsun, Sold as a Set of 5

Part Number: KGB-MB5595AM

Not Yet Reviewed

Estimated Ship Date: Jun 23, 2026 if ordered today

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Estimated Ship Date: Jun 23, 2026 if ordered today

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