Main Bearings

Main Bearings, 1/2 Groove, Standard Size, Bi Metal, Silicon Aluminum, Chevrolet, Small Block, Set of 5

Part Number: SUM-172000

4.89 out of 5 stars ( 37 )

Estimated Ship Date: Today

Main Bearings, 1/2 Groove, Standard Size, Bi-metal, Silicon Aluminum, Chevy, Small Block, Set of 5

Part Number: KGB-MB557SI

4.0 out of 5 stars ( 9 )

Estimated Ship Date: Today

Main Bearings, 1/2 Groove, Standard Size, Bi Metal, Silicon Aluminum, Ford, 221-302, Set of 5

Part Number: SUM-172100

5.0 out of 5 stars ( 6 )

Estimated Ship Date: Today

Main Bearings, 1/2 Groove, .010 in. Crankshaft Undersize, Bi-metal, Silicon Aluminum, Chevy, Small Block, Set of 5

Part Number: KGB-MB557SI010

4.67 out of 5 stars ( 6 )

Estimated Ship Date: Today

Main Bearings, 1/2 Groove, .020 in. Crankshaft Undersize, Bi Metal, Silicon Aluminum, Chevy, Small Block, Set of 5

Part Number: SUM-172020

3.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Main Bearings, 1/2 Groove, Standard Size, Bi-metal, Silicon Aluminum, Ford, Small Block, Set of 5

Part Number: KGB-MB529SI

4.25 out of 5 stars ( 4 )

Estimated Ship Date: Today

Main Bearings, 1/2 Groove, .030 in. Crankshaft Undersize, Bi Metal, Silicon Aluminum, Chevy, Small Block, Set of 5

Part Number: SUM-172030

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Today

Main Bearings, 1/2 Groove, .010 in. Crankshaft Undersize, Bi Metal, Silicon Aluminum, Ford, 221-302, Set of 5

Part Number: SUM-172110

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

Main Bearings, 1/2 Groove, .020 in. Crankshaft Undersize, Bi-metal, Silicon Aluminum, Chevy, Small Block, Set of 5

Part Number: KGB-MB557SI020

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Main Bearings, 1/2 Groove, .030 in. Crankshaft Undersize, Bi-metal, Silicon Aluminum, Chevy, Small Block, Set of 5

Part Number: KGB-MB557SI030

Not Yet Reviewed

Estimated Ship Date: Today

Main Bearings, 1/2 Groove, .020 in. Crankshaft Undersize, Bi Metal, Silicon Aluminum, Ford, 221-302, Set of 5

Part Number: SUM-172120

4.5 out of 5 stars ( 2 )

Estimated Ship Date: Today

Main Bearings, 1/2 Groove, .040 in. Crankshaft Undersize, Bi-metal, Silicon Aluminum, Chevy, Small Block, Set of 5

Part Number: KGB-MB557SI040

Not Yet Reviewed

Estimated Ship Date: Today

Main Bearings, 1/2 Groove, .040 in. Crankshaft Undersize, Bi-metal, Silicon Aluminum, Ford, Small Block, Set of 5

Part Number: KGB-MB529SI040

Not Yet Reviewed

Estimated Ship Date: Today

Main Bearings, 1/2 Groove, .002 in. Crankshaft Undersize, Bi Metal, Jeep, 2.5, 3.8, 4.0, 4.2L, Pair

Part Number: CWA-J8133682

Not Yet Reviewed

Estimated Ship Date: Today

Main Bearings, King SI-Series Main Bearings, .010 in., .25 mm Crankshaft Undersize, Bi-Metal, Chrysler, Dodge, Sold as a Set of 5

Part Number: KGB-MB5840SI025

Not Yet Reviewed

Estimated Ship Date: Today

Main Bearings, King SI-Series Main Bearings, Stock Size, Bi-Metal, Chevy, Sold as a Set of 5

Part Number: KGB-MB5532SI

Not Yet Reviewed

Estimated Ship Date: Today

Main Bearings, AM-Series, Alecular Silicon, 0.25mm Crankshaft Undersize, Mitsubishi, 3.0L, Set of 4

Part Number: KGB-MB459SI025

Not Yet Reviewed

Estimated Ship Date: Feb 2, 2026 if ordered today

• Drop Ship
• Special Order

Main Bearings, 1/2 Groove, .010 in. Crankshaft Undersize, Bi-metal, Silicon Aluminum, GM V6, Set of 5

Part Number: KGB-MB445SI010

Not Yet Reviewed

Estimated Ship Date: Today

Main Bearings, AM-Series, Alecular Silicon, 0.25mm Crankshaft Undersize, Toyota, 2.2, 2.4L, Set of 5

Part Number: KGB-MB506AM025

Not Yet Reviewed

Estimated Ship Date: Feb 2, 2026 if ordered today

• Drop Ship
• Special Order

Main Bearing,

Part Number: CWA-J8133683

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Main Bearings, 1/2 Groove, .020 in. Crankshaft Undersize, Bi-metal, Silicon Aluminum, GM V6, Set of 5

Part Number: KGB-MB445SI020

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Main Bearings, King SI-Series Main Bearings, Stock Size, Bi-Metal, Chrysler, Dodge, Sold as a Set of 5

Part Number: KGB-MB5840SI

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Main Bearings, 1/2 Groove, Standard Size, Bi-metal, Silicon Aluminum, Set of 4

Part Number: KGB-MB4056SI

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Main Bearings, 1/2 Groove, .001 in. Crankshaft Undersize, Bi-metal, Silicon Aluminum, GM V6, Set of 5

Part Number: KGB-MB445SI001

Not Yet Reviewed

Estimated Ship Date: Feb 2, 2026 if ordered today

• Drop Ship
• Special Order