Availability
1978 Main Bearings
Main Bearings, Aluglide, A-Series, Grooved, Bi-Metal Design, Aluminum/Tin/Silicon, 0.02 in./0.50mm Undersize Crankshaft, Chevy, GMC, 6.6L, Set of 5
Part Number: PEB-5M1038A-20
Not Yet Reviewed
Estimated Ship Date: Today
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: Jun 23, 2026 if ordered today
Estimated Ship Date: Jun 23, 2026 if ordered today
Main Bearing Set;
Part Number: SLP-4289M20
Not Yet Reviewed
Estimated Ship Date: Apr 14, 2026 if ordered today
Estimated Ship Date: Apr 14, 2026 if ordered today
Main Bearings, SI-Series, Silicon Aluminum, 0.030 in. Crankshaft Undersize, Chevy, Small Block, Set of 5
Part Number: KGB-MB5183SI030
Not Yet Reviewed
Estimated Ship Date: Jun 22, 2026 if ordered today
Estimated Ship Date: Jun 22, 2026 if ordered today
Main Bearings, H Series, Standard Size, Alecular, Chevy, Small Block, Set of 5
Part Number: EW1-MS909H
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Main Bearing, Ford 2300 Stroker Single Plug VINs 1,6,A,B,M,Y 1974-97 Standard Size, Set
Part Number: SUM-1117HS
Estimated Ship Date: Today
Estimated Ship Date: Today
Main Bearings, SI-Series, 1/2 Groove, .030 in. Crankshaft Undersize, Bi-metal, Aluminum Silicon, Jeep, Chrysler, Set of 5
Part Number: KGB-MB517SI030
Not Yet Reviewed
Estimated Ship Date: Jun 24, 2026 if ordered today
Estimated Ship Date: Jun 24, 2026 if ordered today
Main Bearing Set, CHEVROLET 369-502 Gen IV, V, VI - pMaxKote
Part Number: KGB-MB556XPC020
Not Yet Reviewed
Estimated Ship Date: Jun 23, 2026 if ordered today
Estimated Ship Date: Jun 23, 2026 if ordered today
Need It Sooner? We recommend these similar substitute parts:
Main Bearings, P Series, Standard Size, Tri Metal, Ford, Small Block, Set of 5
Part Number: EW1-MS590P
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Main Bearings, AM-Series, 1/2 Groove, .020 in. Crankshaft Undersize, Chrysler, Dodge, Plymouth, 170, 198, 225, Set of 4
Part Number: KGB-MB407AM020
Not Yet Reviewed
Estimated Ship Date: Jun 23, 2026 if ordered today
Estimated Ship Date: Jun 23, 2026 if ordered today
Main Bearings, Duraglide, P-Series, Grooved, Tri-Metal Style, 0.001 Extra Clearance, Stock Size Crank, Chevy, 6.5L, 6.6L, 7.0L, 7.4L, Set of 5
Part Number: PEB-5M829P-01
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Main Bearings, P Series, .010 in. Crankshaft Undersize, 1/2 Groove, Ford, Set
Part Number: CLE-MS979A10
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Main Bearings, Full Groove, Standard Size, Bi-metal, Silicon Aluminum, Set of 4
Part Number: KGB-MB431SI
Not Yet Reviewed
Estimated Ship Date: Jun 23, 2026 if ordered today
Estimated Ship Date: Jun 23, 2026 if ordered today
Main Bearings, H-Series, 0.020 in. Crankshaft Undersize, Tri Metal, Oldsmobile, 400, 425, 455, Set of 5
Part Number: CLE-MS804H20
Not Yet Reviewed
Estimated Ship Date: May 11, 2026 if ordered today
Estimated Ship Date: May 11, 2026 if ordered today
Main Bearings, 1/2 Groove, .030 in. Crankshaft Undersize, Bi-metal, Silicon Aluminum, GM V6, Set of 5
Part Number: KGB-MB445SI030
Not Yet Reviewed
Estimated Ship Date: Jun 23, 2026 if ordered today
Estimated Ship Date: Jun 23, 2026 if ordered today
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
Not Yet Reviewed
Estimated Ship Date: Apr 15, 2026 if ordered today
Estimated Ship Date: Apr 15, 2026 if ordered today
Main Bearings, 0.001 in. Crankshaft Undersize, Tri Metal, Full Groove, Chevy, V6, 3.3L, 3.8L, 4.3L, Set of 4
Part Number: SLP-5085M1
Not Yet Reviewed
Estimated Ship Date: Apr 14, 2026 if ordered today
Estimated Ship Date: Apr 14, 2026 if ordered today
Main Bearings, SI-Series, Silicon Aluminum, 0.040 in. Crankshaft Undersize, Chevy, Small Block, Set of 5
Part Number: KGB-MB5184SI040
Not Yet Reviewed
Estimated Ship Date: Jun 24, 2026 if ordered today
Estimated Ship Date: Jun 24, 2026 if ordered today
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
Estimated Ship Date: Today
Estimated Ship Date: Jun 23, 2026 if ordered today
Main Bearings, Bi-metal, Silicon Aluminum, 1/2 Groove Style, 0.020 in. Undersize, Chevy, Big Block, Set of 5
Part Number: KGB-MB556HP020X
Not Yet Reviewed
Estimated Ship Date: Jun 22, 2026 if ordered today
Estimated Ship Date: Jun 22, 2026 if ordered today
Main Bearings, Race Series Main Bearing Sets, 0.001 in. Crankshaft Undersize, Tri-metal Copper-lead Alloy, Chevrolet, Big Block, Set of 5
Part Number: SUM-829HXCS
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Main Bearings, Ford, 240, 250, 300 6-cyl., 1966-1996, 0.030 in., Set
Part Number: KGB-MB7750SI030
Not Yet Reviewed
Estimated Ship Date: Jun 23, 2026 if ordered today
Estimated Ship Date: Jun 23, 2026 if ordered today
Main Bearings, AM-Series, Full Groove, Standard Size, Bi Metal, for Nissan, 2.0, 2.2, 2.4L, Set 5
Part Number: KGB-MB5233AM
Not Yet Reviewed
Estimated Ship Date: Jun 23, 2026 if ordered today
Estimated Ship Date: Jun 23, 2026 if ordered today
Main Bearings, SI-Series, Full Groove, .040 in. Crankshaft Undersize, Bi-metal, Silicon Aluminum, Ford, Set of 5
Part Number: KGB-MB5504SI040
Not Yet Reviewed
Estimated Ship Date: Jun 24, 2026 if ordered today
Estimated Ship Date: Jun 24, 2026 if ordered today
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