Main Bearings

Summit Precision High-Tensile Tri-Metal Alloy Racing Main Bearings, Chevy LS, .001 undersize (thicker), Racing 270 Deg. Oil groove, set

Part Number: SUM-7298H01

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Estimated Ship Date: Monday 9/22/2025

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Summit Precision High-Tensile Tri-Metal Alloy Racing Main Bearings, BBF 460 .010 undersize (thicker), 3/4 Upper and Lower groove, set

Part Number: SUM-1039H010

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Estimated Ship Date: Monday 9/22/2025

Summit Precision High-Tensile Tri-Metal Alloy Racing Main Bearings, BBF 460 .001 Extra Clearance, 3/4 Upper and Lower groove, set

Part Number: SUM-1039HXS

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Estimated Ship Date: Monday 9/22/2025

Main Bearings, Competition, 0.020 in. Crankshaft Undersize, Tri Metal, 3/4 Groove, Chevy, 302, 305, 350, Set of 5

Part Number: SLP-139M20

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Estimated Ship Date: Monday 9/22/2025

Main Bearings, Performance, 0.020 in. Crankshaft Undersize, Tri Metal, 3/4 Groove, Ford, Mercury, 351C, Set of 5

Part Number: SLP-146M20

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 9/22/2025

Summit Precision High-Tensile Tri-Metal Alloy Racing Main Bearings, SBC 327 Main .001 Extra Clearance, 3/4 Upper and Lower groove, set

Part Number: SUM-429HXS

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Estimated Ship Date: Monday 9/22/2025

Main Bearings, Competition, 0.020 in. Crankshaft Undersize, Super Duty Alloy, H-14, 3/4 Groove, Pontiac, 350, 389, 400, Set of 5

Part Number: SLP-113M20

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Estimated Ship Date: Oct 9, 2025 if ordered today

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Main Bearings, 0.010 in. Crankshaft Undersize, Bi Metal, 3/4 Groove, Chevy, V6, 3.3L, 3.8L, 4.3L, Set of 4

Part Number: SLP-5085MA10

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Estimated Ship Date: Oct 9, 2025 if ordered today

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Main Bearings, AM-Series, Alecular Silicon, 0.25mm Crankshaft Undersize, Ford, 2.3, 2.5L, Set of 5

Part Number: KGB-MB5278AM025

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 9/22/2025

Main Bearings, Competition Series, Standard Size, Tri metal, 3/4 Groove, Ford, 4.6L, for Cast Iron Block, Set

Part Number: SLP-148M

Not Yet Reviewed

Estimated Ship Date: Monday 9/22/2025

Summit Precision High-Tensile Tri-Metal Alloy Racing Main Bearings, SBC 327 Main .010 undersize (thicker), 3/4 Upper and Lower groove, set

Part Number: SUM-429H010

Not Yet Reviewed

Estimated Ship Date: Monday 9/22/2025

Summit Precision High-Tensile Tri-metal Alloy COATED Racing Main Bearings, Ford Cleveland .010 undersize (thicker), 3/4 Upper and Lower groove, set

Part Number: SUM-1010HC10

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Estimated Ship Date: Monday 9/22/2025

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Main Bearings, Performance, 0.001 in. Crankshaft Undersize, Tri Metal, 3/4 Groove, Ford, Mercury, 351C, Set of 5

Part Number: SLP-146M1

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Estimated Ship Date: Oct 8, 2025 if ordered today

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Main Bearings, SI-Series, Silicon Aluminum, 0.25mm. Crankshaft Undersize, Ford, 3.8, 3.9, 4.2L, Set of 4

Part Number: KGB-MB4034SI025

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Estimated Ship Date: Dec 18, 2025 if ordered today

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Main Bearing, Subaru EJ15,16,18,20,22,25,20T,20TT,22T,25T thrust #3 .001 Undersize, Set

Part Number: SUM-8297H1

Not Yet Reviewed

Estimated Ship Date: Monday 9/22/2025

Main Bearings, AM-Series, Alecular Silicon, 0.75mm Crankshaft Undersize, Ford, 2.3, 2.5L, Set of 5

Part Number: KGB-MB5278AM075

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Estimated Ship Date: Dec 16, 2025 if ordered today

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Main Bearings, 0.020 in. Crankshaft Undersize, Bi Metal, 3/4 Groove, Chevy, V6, 3.3L, 3.8L, 4.3L, Set of 4

Part Number: SLP-5085MA20

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Estimated Ship Date: Oct 9, 2025 if ordered today

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Main Bearings, AM-Series, Alecular Silicon, 0.50mm Crankshaft Undersize, Ford, 2.3, 2.5L, Set of 5

Part Number: KGB-MB5278AM05

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Estimated Ship Date: Dec 18, 2025 if ordered today

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Main Bearings, XP-Series, Tri-metal, 0.25mm. Crankshaft Undersize, Nissan Skyline 2.6L RB26DETT Only, Set of 7

Part Number: KGB-MB7092XP025

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Estimated Ship Date: Dec 18, 2025 if ordered today

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Main Bearings, SI-Series, Silicon Aluminum, 0.25mm. Crankshaft Undersize, Chevy, 2.8, 3.1, 3.4L, Set of 4

Part Number: KGB-MB4080SI025

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Dec 18, 2025 if ordered today

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Main Bearings, King XP-Series Main Bearings, Stock Size, Tri-Metal, Volvo, Sold as a Set of 5

Part Number: KGB-MB612XP

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Estimated Ship Date: Monday 9/22/2025

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Main Bearings, XP-Series, Copper/Lead/Nickel, 0.50mm. Crankshaft Undersize, Nissan, 3.0L, Set of 6

Part Number: KGB-MB4104XP05

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Estimated Ship Date: Dec 16, 2025 if ordered today

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Main Bearings, 3/4 Groove, Standard Size, Bi-metal, Silicon Aluminum, Set of 4

Part Number: KGB-MB4080SI

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Estimated Ship Date: Monday 9/22/2025

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

Part Number: KGB-MB612AM

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Estimated Ship Date: Dec 16, 2025 if ordered today

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Main Bearings, King XP-Series Coated Main Bearings, Stock Size, Tri-Metal, Toyota, Sold as a Set of 5

Part Number: KGB-MB5554XPC

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Estimated Ship Date: Dec 18, 2025 if ordered today

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