Main Bearings

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

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Estimated Ship Date: Monday 11/24/2025

Main Bearing, Nissan L Series 1967-86, Z-Car 2.0,2.8L .001 Undersize, Set

Part Number: SUM-1172H1

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Estimated Ship Date: Monday 11/24/2025

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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 11/24/2025

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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: Feb 19, 2026 if ordered today

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Main Bearings, Race Series Main Bearing Sets, Stock Crankshaft Size, Tri-metal Copper-lead Alloy, Ford, Small Block Windsor 302, Set of 5

Part Number: SUM-590HCS

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Estimated Ship Date: Monday 11/24/2025

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

Part Number: KGB-MB445SI

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Estimated Ship Date: Monday 11/24/2025

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: Dec 9, 2025 if ordered today

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Main Bearing, Audi/VW VR6 -2.8,2.9,3.2,3.6L Standard Size, Set

Part Number: SUM-5532HS

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Estimated Ship Date: Monday 11/24/2025

Summit Precision High-Tensile Tri-Metal Alloy Racing Main Bearings, 351 Windsor .001 undersize (thicker), 3/4 Upper and Lower groove, set

Part Number: SUM-1432H01

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Estimated Ship Date: Monday 11/24/2025

Main Bearings, AM-Series, 3/4 Groove, Standard Size, Bi Metal, Mitsubishi, 1.6, 1.8, 2.0, 2.4L, Set 5

Part Number: KGB-MB5227AM

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Estimated Ship Date: Feb 19, 2026 if ordered today

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Main Bearing, Mitsubishi 4G63/T, 4G64 -1997+ w/TW .001 Undersize, Set

Part Number: SUM-1219H1

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Estimated Ship Date: Monday 11/24/2025

Main Bearing, Subaru EJ15,16,18,20,22,25,20T,20TT,22T,25T thrust #3 Standard Size, Set

Part Number: SUM-8297HS

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Estimated Ship Date: Monday 11/24/2025

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: Feb 19, 2026 if ordered today

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Main Bearings, SI-Series, 3/4 Groove, .010 in. Crankshaft Undersize, Bi-metal, Silicon Aluminum, Ford, 2.9, 4.0L, Set 4

Part Number: KGB-MB4023SI010

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Estimated Ship Date: Feb 19, 2026 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: Dec 11, 2025 if ordered today

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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: Feb 19, 2026 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: Feb 19, 2026 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: Feb 19, 2026 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: Feb 19, 2026 if ordered today

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

Part Number: SUM-429HC010

Not Yet Reviewed

Estimated Ship Date: Monday 11/24/2025

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Main Bearings, Race Series Main Bearing Sets, 0.010 in. Crankshaft Undersize, Tri-metal Copper-lead Alloy, Ford, 5.0L, Set of 5

Part Number: SUM-5655H25

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Estimated Ship Date: Monday 11/24/2025

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Summit Precision High-Tensile Tri-metal Alloy COATED Racing Main Bearings, Ford Cleveland .001 undersize (thicker), 3/4 Upper and Lower groove, set

Part Number: SUM-1010HC01

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Estimated Ship Date: Monday 11/24/2025

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Main Bearings, Race Series Main Bearing Sets, 0.001 in. Crankshaft Undersize, Tri-metal Copper-lead Alloy, Ford, Small Block Windsor 302, Set of 5

Part Number: SUM-590HXCS

Not Yet Reviewed

Estimated Ship Date: Monday 11/24/2025

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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: Feb 19, 2026 if ordered today

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Main Bearings, Race Series Main Bearing Sets, 0.010 in. Crankshaft Undersize, Tri-metal Copper-lead Alloy, Ford, 4.6L, Set of 5

Part Number: SUM-5647H25

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Estimated Ship Date: Monday 11/24/2025

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