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 559AM

Main Bearings, AM-Series, Full Groove, Standard Size, Bi Metal, Ford, Mercury, 330-428, FE, FT, Set 5

Part Number: KGB-MB559AM

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Tomorrow

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King AM-Series Main Bearings MB 559AM 010

Main Bearings, AM-Series, Full Groove, .010 in. Crankshaft Undersize, Bi Metal, Ford, Mercury, 330-428, FE, FT, Set 5

Part Number: KGB-MB559AM010

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

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King AM-Series Main Bearings MB 559AM 020

Main Bearings, AM-Series, Full Groove, .020 in. Crankshaft Undersize, Bi Metal, Ford, Mercury, 330-428, FE, FT, Set 5

Part Number: KGB-MB559AM020

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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King AM-Series Main Bearings MB 554AM

Main Bearings, AM-Series, 1/2 Groove, Standard Size, Bi Metal, Chevy, 265, 283, 302, 327, Set of 5

Part Number: KGB-MB554AM

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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King AM-Series Main Bearings MB 554AM 010

Main Bearings, AM-Series, 1/2 Groove, .010 in. Crankshaft Undersize, Bi Metal, Chevy, 265, 283, 302, 327, Set of 5

Part Number: KGB-MB554AM010

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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King AM-Series Main Bearings MB5503AM

Main Bearings, AM-Series, 3/4 Groove, Standard Size, Bi-metal, Alecular Alloy, Ford, 351C, Set of 5

Part Number: KGB-MB5503AM

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

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King AM-Series Main Bearings MB5518AM 020

Main Bearings, AM-Series, 1/2 Groove, .020 in. Undersize, Bi Metal, AMC, Jeep, 290-401, Set of 5

Part Number: KGB-MB5518AM020

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Tomorrow

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King AM-Series Main Bearings MB5518AM 030

Main Bearings, AM-Series, 1/2 Groove, .030 in. Crankshaft Undersize, Bi Metal, AMC, Jeep, 290-401, Set of 5

Part Number: KGB-MB5518AM030

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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King AM-Series Main Bearings MB 438AM 010

Main Bearings, AM-Series, 1/2 Groove, .010 in. Crankshaft Undersize, Bi Metal, Chrysler, 170, 198, 225, Set of 4

Part Number: KGB-MB438AM010

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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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: Tomorrow

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King AM-Series Main Bearings MB 554AM 020

Main Bearings, AM-Series, 1/2 Groove, .020 in. Crankshaft Undersize, Bi Metal, Chevy, 265, 283, 302, 327, Set of 5

Part Number: KGB-MB554AM020

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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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 )

Estimated Ship Date: Tomorrow

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King AM-Series Main Bearings MB5518AM 010

Main Bearings, AM-Series, 1/2 Groove, .010 in. Undersize, Bi Metal, AMC, Jeep, 290-401, Set of 5

Part Number: KGB-MB5518AM010

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

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King AM-Series Main Bearings MB5518AM 040

Main Bearings, AM-Series, 1/2 Groove, .040 in. Crankshaft Undersize, Bi Metal, AMC, Jeep, 290-401, Set of 5

Part Number: KGB-MB5518AM040

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

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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

Estimated Ship Date: Tomorrow

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King AM-Series Main Bearings MB5521AM0.25

Main Bearings, AM-Series, Alecular Silicon, 0.25mm Crankshaft Undersize, Chrysler, Dodge, Plymouth, 2.2L, Set of 5

Part Number: KGB-MB5521AM025

Not Yet Reviewed

Estimated Ship Date: Apr 23, 2026 if ordered today

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Estimated Ship Date: Apr 23, 2026 if ordered today

King AM-Series Main Bearings MB5503AM 020

Main Bearings, AM-Series, 1/2 Groove, .020 in. Crankshaft Undersize, Bi Metal, Ford, 351C, Set of 5

Part Number: KGB-MB5503AM020

Not Yet Reviewed

Estimated Ship Date: Apr 22, 2026 if ordered today

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Estimated Ship Date: Apr 22, 2026 if ordered today

King AM-Series Main Bearings MB 580AM

Main Bearings, AM-Series, Full Groove, Standard Size, Bi Metal, Toyota, 2.2, 2.4L, Set 5

Part Number: KGB-MB580AM

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Apr 22, 2026 if ordered today

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Estimated Ship Date: Apr 22, 2026 if ordered today

King AM-Series Main Bearings for 1971-1974 CAPRI, PINTO - MB 545AM

Main Bearings, AM-Series, Full Groove, Standard Size, Bi Metal, Ford, 2.0L, Set of 5

Part Number: KGB-MB545AM

Not Yet Reviewed

Estimated Ship Date: Apr 22, 2026 if ordered today

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Estimated Ship Date: Apr 22, 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: Apr 24, 2026 if ordered today

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Estimated Ship Date: Apr 24, 2026 if ordered today

King AM-Series Main Bearings MB5233AM

Main Bearings, AM-Series, Full Groove, Standard Size, Bi Metal, for Nissan, 2.0, 2.2, 2.4L, Set 5

Part Number: KGB-MB5233AM

Not Yet Reviewed

Estimated Ship Date: Apr 22, 2026 if ordered today

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Estimated Ship Date: Apr 22, 2026 if ordered today

King AM-Series Main Bearings MB5375AM0.25

Main Bearings, King AM-Series Main Bearings, .010 in., .25 mm Crankshaft Undersize, Alecular Silicon, Lotus, Pontiac, Toyota, Sold as a Set

Part Number: KGB-MB5375AM025

Not Yet Reviewed

Estimated Ship Date: Apr 24, 2026 if ordered today

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Estimated Ship Date: Apr 24, 2026 if ordered today

King AM-Series Main Bearings for 1981-1986 CELICA, 1981-1992 CRESSIDA, 1986-1992 SUPRA - MB 787AM

Main Bearings, AM-Series, Standard Size, Bi Metal, Toyota, 2.0, 2.3, 2.6, 2.8L, Set of 7

Part Number: KGB-MB787AM

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

King AM-Series Main Bearings MB 554AM 030

Main Bearings, AM-Series, 1/2 Groove, .030 in. Crankshaft Undersize, Bi Metal, Chevy, 265, 283, 302, 327, Set of 5

Part Number: KGB-MB554AM030

Not Yet Reviewed

Estimated Ship Date: Apr 22, 2026 if ordered today

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Estimated Ship Date: Apr 22, 2026 if ordered today

King AM-Series Main Bearings MB5503AM 030

Main Bearings, AM-Series, 1/2 Groove, .030 in. Crankshaft Undersize, Bi Metal, Ford, 351C, Set of 5

Part Number: KGB-MB5503AM030

Not Yet Reviewed

Estimated Ship Date: Apr 22, 2026 if ordered today

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Estimated Ship Date: Apr 22, 2026 if ordered today

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