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: Monday 11/17/2025

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: Monday 11/17/2025

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: Monday 11/17/2025

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: Monday 11/17/2025

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: Monday 11/17/2025

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: Monday 11/17/2025

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: Monday 11/17/2025

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: Monday 11/17/2025

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: Monday 11/17/2025

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: Monday 11/17/2025

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: Monday 11/17/2025

Main Bearing Set, POLARIS XP900 11-14 & XP1000 14-20 H.D 1.75"

Part Number: KGB-S0105

Not Yet Reviewed

Estimated Ship Date: Feb 10, 2026 if ordered today

• Drop Ship
• Special Order

Main Bearing Set, POLARIS XP900 11-14 & XP1000 14-20 H.D 1.75"

Part Number: KGB-S0104

Not Yet Reviewed

Estimated Ship Date: Feb 10, 2026 if ordered today

• Drop Ship
• Special Order

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: Monday 11/17/2025

Main Bearings, SI-Series, Full Groove, Standard Size, Bi-metal, Silicon Aluminum, Ford, Set of 5

Part Number: KGB-MB5504SI

4.67 out of 5 stars ( 3 )

Estimated Ship Date: Monday 11/17/2025

Main Bearing Set, POLARIS XP900 11-14 & XP1000 14-20 H.D 1.75"

Part Number: KGB-S0106

Not Yet Reviewed

Estimated Ship Date: Feb 10, 2026 if ordered today

• Drop Ship
• Special Order

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: Monday 11/17/2025

Main Bearings, 1/2 Groove, Standard Size, Bi Metal, Alecular Alloy, for use on Honda®/Acura®, Set of 5

Part Number: KGB-MB5568AM

Not Yet Reviewed

Estimated Ship Date: Monday 11/17/2025

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: Monday 11/17/2025

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: Monday 11/17/2025

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: Monday 11/17/2025

Main Bearings, Aluglide, A-Series, 1/2 Groove, Bi-Metal Design, Aluminum/Tin/Silicon, Stock Size Crankshaft, Ford, 4.6L, 5.4L, Set of 5

Part Number: PEB-5M7296A-STD

Not Yet Reviewed

Estimated Ship Date: Monday 11/17/2025

Main Bearings, 1/2 Groove, Standard Size, Bi-metal, Silicon Aluminum, GM V6, Set of 5

Part Number: KGB-MB445SI

Not Yet Reviewed

Estimated Ship Date: Monday 11/17/2025

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: Monday 11/17/2025