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King Engine Bearings MB583AM040 AM-Series Main Bearing Set .040 Undersize Ford Y-Block

(Ford F-250 1954-65, Thunderbird 1955-58, F-350 1954-65, Galaxie 500 1962, F-100 1954-65, Fairlane 1955-62, Ranchero 1957-59, Galaxie 1959-62 + 27 more models)

Part of: King Engine Bearings Main Bearing Set Oversize

Other options in this family: King Engine Bearings MB5835SI0.5 King Engine Bearings MB5557SI0.75 King Engine Bearings MB4102SI0.25 King Engine Bearings MB5280SI0.5 King Engine Bearings MB5770SI0.25

Manufacturer

Picture for manufacturer King Engine Bearings

Part Number

MB583AM040
10 reviews
Sale Price

$180.77

Estimated ship date Tuesday, December 01

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Product Details

The King Engine Bearings MB583AM040 is an AM-Series crankshaft main bearing set designed for Ford Y-Block engines. This is a .040 inch undersize set, engineered for use during engine rebuilds where crankshaft journals have been reground to the .040 under specification. The set covers Ford's classic Y-Block V8 displacements: 239ci, 256ci, 272ci, and 292ci.

Key Features:

  • AM-Series bimetal construction — aluminum-based bearing material equivalent to SAE-783, ideal for low and medium load engine applications
  • .040 inch undersize — sized for crankshafts reground 40 thousandths under standard journal diameter
  • Full groove design — provides consistent oil distribution across the full bearing surface
  • Bull's Eye Tolerance™ Technology — King's proprietary production process combining precision machining, overplating, and computerized wall thickness monitoring for consistent, accurate dimensions
  • Engineered for the aftermarket with a wide range of undersize options available across the King lineup

King Engine Bearings has specialized exclusively in engine bearings since 1960, supplying the aviation and racing industries as well as the automotive aftermarket. The AM-Series aluminum bimetal material offers excellent conformability and embedability, making it a proven choice for classic Ford Y-Block engine rebuilds requiring standard replacement bearings.

Products specifications

Fits

Ford F-250 1954-65, Thunderbird 1955-58, F-350 1954-65, Galaxie 500 1962, F-100 1954-65, Fairlane 1955-62, Ranchero 1957-59, Galaxie 1959-62, Custom 1957, Country Sedan 1954-62, Ranch Wagon 1954-62, Country Squire 1954-62 + 23 more models

Bearing Material

Alecular silicon

Bearing Usage

Performance

Groove Location

Upper and lower

Groove Style

Full

Grooved Bearing

Yes

Quantity

Sold as a set of 5.

Flange Oversize

FL ON MAX

Material

bimetal (aluminum base)

Undersize

040

Prop 65

WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov

Title

King Bearings

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