This item is for a .010-in. over size King main bearing set for 1959-1979 Pontiac 195ci (4-cylinder), 326ci, 350ci, 389ci, and 400ci V-8 engines; see fitment below. P/N MB5523AM-010. These bearings are for Pontiac designed engines and will not fit engines designed by other GM divisions; e.g. Cadillac, Chevrolet, Buick. Feel free to message with fitment questions.

King AM-series main bearings are recommended for street, marine, and mild strip applications. These crankshaft bearings have superior embeddability which provides much 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 +/-.0001-in. 

FITMENT INCLUDES

• 195ci (3.2L) 1961-1963
• 326ci (5.3L) 1963-1967
• 350ci (5.7L) 1968-1977
• 389ci (6.4L) 1959-1966
• 400ci (6.6L) 1967-1979

BEARING SPECIFICATIONS

• Crankshaft Undersize: .010-in. (.25mm)
• Bearing Type: Full annular groove
• Bearing Material: Alecular silicon

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Please note that "free shipping" is not free for us but only to you. We pay to ship all parts to customers. Should you decide to return your purchase due to 'buyers remorse', we will refund the parts price less a restocking fee for the return; to mostly recoup our original shipping costs. Any damage to box or parts will alter the amount of the restocking fee. In many cases, we must buy new boxes from our suppliers.

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