Availability
Main Bearings
Main Bearing, 3/4 Groove, .030 in. Crankshaft Undersize, Steel Backed, Aluminum Alloy, Buick, 248, Set of 5
Part Number: KAA-MBS301A030
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Main Bearing, Full Groove, .030 in. Crankshaft Undersize, Steel Backed, Aluminum Alloy, Ford, Mercury, 312, Set of 5
Part Number: KAA-MBS1717-030
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Main Bearing, 1/2 Groove, .002 in. Crankshaft Undersize, Steel Backed, Aluminum Alloy, Chevy, 235, 261, Set of 4
Part Number: KAA-MBS1721-002
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Main Bearing, Full Groove, .020 in. Crankshaft Undersize, Steel Backed, Aluminum Alloy, Chevy, 348, 409, Set of 5
Part Number: KAA-MBS2458-020
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Main Bearing, Full Groove, .040 in. Crankshaft Undersize, Steel Backed, Aluminum Alloy, Chevy, 348, 409, Set of 5
Part Number: KAA-MBS2458-040
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Main Bearing, 1/2 Groove, Standard Size, Steel Backed, Aluminum Alloy, Chevy, 235, 261, Set of 4
Part Number: KAA-MBS1721-STD
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Main Bearing, 1/2 Groove, .002 in. Crankshaft Undersize, Steel Backed, Aluminum Alloy, Pontiac, 347, 370, Set of 5
Part Number: KAA-MBS2434-002
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Main Bearing, Full Groove, .020 in. Crankshaft Undersize, Steel Backed, Aluminum Alloy, Edsel, Ford, Mercury, 239, 256, 272, 292, Set of 5
Part Number: KAA-MBS1575-020
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Main Bearing, Full, .030 in. Crankshaft Undersize, Steel Backed, Aluminum Alloy, American Motors, Hudson, Jeep, Nash, 250, 287, 327, Set of 5
Part Number: KAA-MBS1780-030
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Main Bearing, Full Groove, .010 in. Crankshaft Undersize, Steel Backed, Aluminum Alloy, DeSoto, Dodge, 315, 325, 330, 341, 345, Set of 5
Part Number: KAA-MBS2446-010
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Main Bearing, 1/2 Groove, .030 in. Crankshaft Undersize, Steel Backed, Aluminum Alloy, Pontiac, 347, 370, Set of 5
Part Number: KAA-MBS2434-030
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Main Bearing, Full Groove, .040 in. Crankshaft Undersize, Steel Backed, Aluminum Alloy, Chrysler, DeSoto, 228, 237, 242, 251, 265, Set of 4
Part Number: KAA-MBS327M040
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Main Bearing, Full Groove, .030 in. Crankshaft Undersize, Steel Backed, Aluminum Alloy, Ford, Mercury, 144, 170, 200, Set of 4
Part Number: KAA-MBS2518-030
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Main Bearing, Full Groove, .020 in. Crankshaft Undersize, Steel Backed, Aluminum Alloy, Ford, Mercury, 144, 170, 200, Set of 4
Part Number: KAA-MBS2518-020
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Main Bearing, Full Groove, .010 in. Crankshaft Undersize, Steel Backed, Aluminum Alloy, Cadillac, 368, 425, 472, 500, Set of 5
Part Number: KAA-MBS2970-010
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Main Bearing, Full Groove, Standard Size, Steel Backed, Aluminum Alloy, Cadillac, 390, 429, Set of 5
Part Number: KAA-MBS2663-STD
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Main Bearing, Full Groove, .020 in. Crankshaft Undersize, Steel Backed, Aluminum Alloy, Cadillac, 390, 429, Set of 5
Part Number: KAA-MBS2663-020
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Main Bearing, 3/4 Groove, .040 in. Crankshaft Undersize, Steel Backed, Aluminum Alloy, Buick, 248, Set of 5
Part Number: KAA-MBS301A040
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Main Bearing, Full Groove, .010 in. Crankshaft Undersize, Steel Backed, Aluminum Alloy, Chevy, 216, 235, Set of 4
Part Number: KAA-MBS918M010
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Main Bearing, Full Groove, Standard Size, Steel Backed, Aluminum Alloy, Cadillac, LaSalle, 322, 346, Set of 3
Part Number: KAA-MBS412-STD
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Main Bearing, Full Groove, .040 in. Crankshaft Undersize, Steel Backed, Aluminum Alloy, GMC, 228, 248, 270, Set of 4
Part Number: KAA-MBS929M040
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Main Bearings, King SI-Series Main Bearings, .010 in., .25 mm Crankshaft Undersize, Bi-Metal, BMW, Sold as a Set of 5
Part Number: KGB-MB5784SI025
Not Yet Reviewed
Estimated Ship Date: Jul 27, 2026 if ordered today
Estimated Ship Date: Jul 27, 2026 if ordered today
Main Bearing, Full Groove, Standard Size, Steel Backed, Aluminum Alloy, Ford, Mercury, 144, 170, 200, Set of 4
Part Number: KAA-MBS2518-STD
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Main Bearing, Full Groove, .001 in. Crankshaft Undersize, Steel Backed, Aluminum Alloy, Ford, 215, 223, Set of 4
Part Number: KAA-MBS2525-001
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
Main Bearing, Full Groove, .030 in. Crankshaft Undersize, Steel Backed, Aluminum Alloy, Chevy, 348, 409, Set of 5
Part Number: KAA-MBS2458-030
Not Yet Reviewed
Estimated Ship Date: May 27, 2026 if ordered today
Estimated Ship Date: May 27, 2026 if ordered today
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