Main Bearing Set For Ford 281 - MB5280SI

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As low as $44.92
King Bearings' bi-metal SI material blends Aluminum with 2.5-3% Silicon, providing strength. Ideal for medium-load engines, particularly engines using nodular cast iron crankshafts. It excels as a Lead-free OE replacement Bearing.
Commonly use for medium-load engines particularly ones using nodular cast iron crankshafts
Crankshaft Dim. Housing Dim. Length Thickness
Positions 1,2,3,4,5:
67.50 / 67.48 mm
2.6576 / 2.6568 inch

Position 5:
72.20 / 72.00 mm
2.8425 / 2.8346 inch

Position 5:
75.60 / 75.40 mm
2.9764 / 2.9685 inch
Positions 1,2,3,4,5:
72.42 / 72.40 mm
2.8512 / 2.8505 inch

Position 5:
91.40 / 91.20 mm
3.5984 / 3.5906 inch

Position 5:
110.60 / 110.40 mm
4.3543 / 4.3465 inch
Position 1:
19.1 mm
0.752 inch

Positions 2,3,4,5:
19.2 mm
0.756 inch

Positions 5,5:
0.0 mm
0.000 inch
Positions 1,2,3,4,5:
2.443 mm
0.0962 inch

Positions 5,5:
2.920 mm
0.1150 inch
Main Bearing Set For FORD 281 - MB5280SI
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Performance features

Material features

Tech Features

Aluminum Based
aluminum base
Bi Metal Aluminum material

Lead free Aluminum based material used for low to heavy load engines

Lead free
Lead Free
Environmentally safe composite

A lead-free bearing material prioritizes environmental sustainability and safety, utilizing alternative compounds to achieve optimal performance in diverse applications.

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