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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Results 1 - 25 of 42

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: Today

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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: Today

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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: Today

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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: Today

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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: Today

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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: Today

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King AM-Series Main Bearings MB5523AM 010

Main Bearings, AM-Series, Full Groove, .010 in. Crankshaft Undersize, Bi Metal, Pontiac, 326, 350, 389, 400, Set of 5

Part Number: KGB-MB5523AM010

Not Yet Reviewed

Estimated Ship Date: Today

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King AM-Series Main Bearings MB5514AM

Main Bearings, AM-Series, Full Groove, Standard Size, Bi Metal, Oldsmobile, 260, 307, 330, 350, 403, Set of 5

Part Number: KGB-MB5514AM

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Jun 12, 2026 if ordered today

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Estimated Ship Date: Jun 12, 2026 if ordered today

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: Today

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King AM-Series Main Bearings MB5514AM 020

Main Bearings, AM-Series, Full Groove, .020 in. Crankshaft Undersize, Bi Metal, Oldsmobile, 260, 307, 330, 350, 403

Part Number: KGB-MB5514AM020

Not Yet Reviewed

Estimated Ship Date: Jun 12, 2026 if ordered today

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Estimated Ship Date: Jun 12, 2026 if ordered today

King AM-Series Main Bearings MB 762AM 010

Main Bearings, AM-Series, .010 in. Crankshaft Undersize, Bi Metal, Ford, Mercury, 200, Set of 7

Part Number: KGB-MB762AM010

Not Yet Reviewed

Estimated Ship Date: Jun 12, 2026 if ordered today

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Estimated Ship Date: Jun 12, 2026 if ordered today

King AM-Series Main Bearings MB5514AM 010

Main Bearings, AM-Series, Full Groove, .010 in. Crankshaft Undersize, Bi Metal, Oldsmobile, 260, 307, 330, 350, 403

Part Number: KGB-MB5514AM010

Not Yet Reviewed

Estimated Ship Date: Jun 9, 2026 if ordered today

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Estimated Ship Date: Jun 9, 2026 if ordered today

King AM-Series Main Bearings MB 554AM 040

Main Bearings, AM-Series, 1/2 Groove, .040 in. Crankshaft Undersize, Bi Metal, Chevy, 265, 283, 302, 327, Set of 5

Part Number: KGB-MB554AM040

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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King AM-Series Main Bearings MB 407AM 010

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

Part Number: KGB-MB407AM010

Not Yet Reviewed

Estimated Ship Date: Jun 9, 2026 if ordered today

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Estimated Ship Date: Jun 9, 2026 if ordered today

King AM-Series Main Bearings MB 554AM 060

Main Bearings, AM-Series, 1/2 Groove, .060 in. Crankshaft Undersize, Bi Metal, Chevy, 265, 283, 302, 327, Set of 5

Part Number: KGB-MB554AM060

Not Yet Reviewed

Estimated Ship Date: Jun 11, 2026 if ordered today

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Estimated Ship Date: Jun 11, 2026 if ordered today

King AM-Series Main Bearings MB 319AM 040

Main Bearings, Full Groove, .040 in. Crankshaft Undersize, Bi Metal, Alecular Alloy, AMC, Willys, Set of 3

Part Number: KGB-MB319AM040

Not Yet Reviewed

Estimated Ship Date: Jun 9, 2026 if ordered today

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Estimated Ship Date: Jun 9, 2026 if ordered today

King AM-Series Main Bearings MB 559AM 030

Main Bearings, AM-Series, Full Groove, .030 in. Crankshaft Undersize, Bi Metal, Ford, Mercury, 330-428, FE, FT, Set 5

Part Number: KGB-MB559AM030

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Jun 12, 2026 if ordered today

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Estimated Ship Date: Jun 12, 2026 if ordered today

King AM-Series Main Bearings MB 554AM 050

Main Bearings, AM-Series, 1/2 Groove, .050 in. Undersize, Bi Metal, Chevy, 265, 283, 302, 327, Set of 5

Part Number: KGB-MB554AM050

Not Yet Reviewed

Estimated Ship Date: Jun 9, 2026 if ordered today

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Estimated Ship Date: Jun 9, 2026 if ordered today

King AM-Series Main Bearings MB 407AM 020

Main Bearings, AM-Series, 1/2 Groove, .020 in. Crankshaft Undersize, Chrysler, Dodge, Plymouth, 170, 198, 225, Set of 4

Part Number: KGB-MB407AM020

Not Yet Reviewed

Estimated Ship Date: Jun 15, 2026 if ordered today

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Estimated Ship Date: Jun 15, 2026 if ordered today

King AM-Series Main Bearings MB 438AM 020

Main Bearings, AM-Series, 1/2 Groove, .020 in. Crankshaft Undersize, Bi Metal, Chrysler, 170, 198, 225, Set of 4

Part Number: KGB-MB438AM020

Not Yet Reviewed

Estimated Ship Date: Jun 12, 2026 if ordered today

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Estimated Ship Date: Jun 12, 2026 if ordered today

King AM-Series Main Bearings MB 328AM 010

Main Bearings, Full Groove, .010 in. Crankshaft Undersize, Bi Metal, Alecular Alloy, British Leyland, Set of 3

Part Number: KGB-MB328AM010

Not Yet Reviewed

Estimated Ship Date: Today

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Estimated Ship Date: Today

King AM-Series Main Bearings MB 407AM 040

Main Bearings, AM-Series, 1/2 Groove, .040 in. Crankshaft Undersize, Chrysler, Dodge, Plymouth, 170, 198, 225, Set of 4

Part Number: KGB-MB407AM040

Not Yet Reviewed

Estimated Ship Date: Jun 10, 2026 if ordered today

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Estimated Ship Date: Jun 10, 2026 if ordered today

King AM-Series Main Bearings MB 328AM 020

Main Bearings, Full Groove, .020 in. Crankshaft Undersize, Bi Metal, Alecular Alloy, British Leyland, Set of 3

Part Number: KGB-MB328AM020

Not Yet Reviewed

Estimated Ship Date: Jun 10, 2026 if ordered today

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Estimated Ship Date: Jun 10, 2026 if ordered today

King AM-Series Main Bearings MB 409AM 050

Main Bearings, AM-Series, Full Groove, .050 in. Crankshaft Undersize, Bi Metal, Ford, 144, 170, 200, Set of 4

Part Number: KGB-MB409AM050

Not Yet Reviewed

Estimated Ship Date: Jun 10, 2026 if ordered today

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Estimated Ship Date: Jun 10, 2026 if ordered today

King AM-Series Main Bearings MB 328AM 050

Main Bearings, Full Groove, .050 in. Crankshaft Undersize, Bi Metal, Alecular Alloy, British Leyland, Set of 3

Part Number: KGB-MB328AM050

Not Yet Reviewed

Estimated Ship Date: Jun 10, 2026 if ordered today

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Estimated Ship Date: Jun 10, 2026 if ordered today

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