Main Bearing Set For Chevrolet 121CI, LN2 134CI - MB5557SI

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As low as $41.00
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
63.38 / 63.36 mm
2.4954 / 2.4945 inch
68.28 / 68.25 mm
2.6880 / 2.6870 inch
Positions 1,2,3,5:
18.8 mm
0.741 inch

Position 4:
24.0 mm
0.946 inch
2.421 mm
0.0953 inch
Main Bearing Set For CHEVROLET 121CI, LN2 134CI - MB5557SI

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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