CHEVROLET Chevy big block Mark IV Engines & Components

Crankshaft, 2-piece Seal, Internal Balance, Forged 4340 Steel, 4.750 in. Stroke, 2.200 in. Pin, Chevy, 454

Part Number: CPI-BBS42B-MG

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Pulley Kit, Track, Serpentine, Clear Aluminum Pulleys, Clear Powdercoated Brackets, GM Type 2, P/S, Chevy, Big Block, Kit

Part Number: MCH-21250

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Crankshaft, 2-Piece Seal, External Balance, Cast Steel, 4.000 in. Stroke, Chevy, 454, Each

Part Number: SUM-180370

4.0 out of 5 stars ( 2 )

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Crankshaft, 2-Piece Seal, External Balance, Forged 4340 Steel, 4.000 in. Stroke, 6.135 Rod, Chevy, 454, Each

Part Number: SCA-445410

3.0 out of 5 stars ( 2 )

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Gen. 4 BB Chevy Forged Steel Crank, 4.250 stroke, Two Piece Rear Seal, Req's Narrowed Rod Bearings, Lightened holes, Nitride, 6.385 in. Rod

Part Number: SUM-BBC425063851

5.0 out of 5 stars ( 1 )

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Crankshaft, 2-Piece Seal, Internal Balance, Forged 4340 Steel, 4.000 in. Stroke, Chevy, 454, Each

Part Number: ESP-445440026135

3.0 out of 5 stars ( 2 )

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Crankshaft, Cast Steel, 4.250 in. Stroke, Chevy, 454, Internal Balance, 2-Piece Seal, Each

Part Number: SCA-945425

3.25 out of 5 stars ( 4 )

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Engine Block, Cast Iron, Nodular Iron Splayed 4-Bolt Mains, 4.495 in. Bore, 2-Piece Seal, 9.800 in. Deck, Chevy, Big Block, Each

Part Number: WRL-091101

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Estimated Ship Date: Jan 8, 2026 if ordered today

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Crankshaft, 2-Piece Seal, Internal Balance, Forged 4340 Steel, 4.250 in. Stroke, Chevy, 7.4L, Each

Part Number: MAN-190140

5.0 out of 5 stars ( 2 )

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Engine Block, Cast Iron, 4-Bolt Mains, 4.245 in. Diameter Bore, 2-Piece Rear Main Seal, Chevy, Big Block, Each

Part Number: WRL-095000

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Jan 7, 2026 if ordered today

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Crankshaft, Standard Weight, Forged 4340 Steel, 4.250 in. Stroke, Internal Balance, Chevy, 454, Each

Part Number: SCA-445425C

1.0 out of 5 stars ( 1 )

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Pulley/Bracket Set, Serpentine, Aluminum, Black Powdercoated, Saginaw P/S, Chevy, Big Block, Kit

Part Number: MCH-21255-08

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Cylinder Heads, Maxx Series, Hydraulic Roller, Assembled, Aluminum, 317cc Intake Runner, Chevrolet, Big Block, Pair

Part Number: PMX-9318

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Estimated Ship Date: Jan 14, 2026 if ordered today

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Engine Block, Cast Iron, Nodular Iron Splayed 4-Bolt Mains, 4.495 in. Bore, 2-Piece Seal, 10.200 in. Deck, Chevy, Big Block, Each

Part Number: WRL-091111

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Estimated Ship Date: Jan 9, 2026 if ordered today

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Pulleys, Sport Track, Serpentine, Standard Ratio, Billet Aluminum, Black Powdercoated, Chevy, Big Block, Kit

Part Number: MCH-23690-08

3.0 out of 5 stars ( 2 )

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Crankshaft, 2-Piece Seal, Internal Balance, Forged 4340 Steel, 4.375 in. Stroke, Chevy, 454, Each

Part Number: ESP-445443756385

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Estimated Ship Date: Jan 16, 2026 if ordered today

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Accessory Drive System, Serpentine, 6-groove, Polished Finished, Power Steering, Air Conditioning, Chevy, Big Block, Kit

Part Number: AAY-FDS-BBC-101

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Estimated Ship Date: Dec 22, 2025 if ordered today

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Pulley Set, Revolver, Serpentine, Aluminum, Air Conditioning, Power Steering, Chrome, Chevrolet, Big Block, Kit

Part Number: MCH-20325

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Estimated Ship Date: Jan 19, 2026 if ordered today

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Crankshaft, External Balance, Cast Steel, 4.25 in. Stroke, Chevy, 454, Each

Part Number: SCA-945420

2.75 out of 5 stars ( 4 )

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Top End Engine Kit, Power Package, Chevy, 540 HP-539 TQ

Part Number: EDL-2095

4.08 out of 5 stars ( 12 )

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Crate Engine, Base Longblock, 454 C.I. 460 HP, 479 TQ, Aluminum Heads, Roller Camshaft, Chevy, Big Block Gen IV, Each

Part Number: MLL-BP454CT

5.0 out of 5 stars ( 1 )

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Crankshaft, 2-Piece Seal, Internal Balance, Forged 4340 Steel, 4.500 in. Stroke, 6.535 Rod, Chevy, 454, Each

Part Number: SCA-445430

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Estimated Ship Date: Feb 13, 2026 if ordered today

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Cylinder Heads, Oval Port, Assembled, Aluminum, 112cc Combustion Chamber, 290cc Intake, Chevy, Big Block, Pair

Part Number: AFR-3640

4.67 out of 5 stars ( 3 )

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Cylinder Heads, CNC Blended Bowls, Aluminum, Assembled, 117cc Chamber, 325cc Intake, Chevy, Big Block, Pair

Part Number: AFR-2101

5.0 out of 5 stars ( 1 )

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Crankshaft, 2-Piece Seal, Internal Balance, Forged 4340 Steel, 4.250 in. Stroke, 6.385 Rod, Chevy, 454, Each

Part Number: SCA-445425

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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