Engines, Bare Blocks - 4-bolt Main Bolt Style - Free Shipping on Orders Over $109 at Summit Racing

Summit Racing™ SPC Engine Blocks SUM-150202

Engine Block, 400 Chevy Small Block, Class 35 German Cast Iron, 4-Bolt 350 Mains, 4.125 in. Unfinished Bore Diameter, 2-Piece Rear Main Seal

Part Number: SUM-150202

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 4/28/2025

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Estimated Ship Date: Monday 4/28/2025

Summit Racing™ SPC Engine Blocks SUM-150201

Engine Block, 400 Chevy Small Block, Class 35 German Cast Iron, 4-Bolt 400 Mains, 4.125 in. Unfinished Bore Diameter, 2-Piece Rear Main Seal

Part Number: SUM-150201

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 4/28/2025

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Estimated Ship Date: Monday 4/28/2025

Dart SHP Special High Performance Small Block Ford Cast Iron Bare Blocks 31374175

Engine Block, Cast Iron , 4-Bolt Mains, 4.000 in. Bore, 1-Piece Rear Main Seal, Ford 302, Small Block, Each

Part Number: DRT-31374175

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 4/28/2025

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Estimated Ship Date: Monday 4/28/2025

Dart SHP Special High Performance Small Block Chevy Cast Iron Bare Blocks 31161111

Dart SHP Special High Performance Small Block Chevy Cast Iron Bare Blocks 31161111

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

Part Number: DRT-31161111

4.83 out of 5 stars ( 6 )

Estimated Ship Date: Monday 4/28/2025

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Estimated Ship Date: Monday 4/28/2025

Dart SHP Special High Performance LS Next Pro Cast Iron Bare Blocks 31867212

Bare Block, Cast Iron, LS Mains, 4.125 in. Bore, 9.24 in. Deck Height, Each

Part Number: DRT-31867212

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 4/28/2025

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Estimated Ship Date: Monday 4/28/2025

Chevrolet Performance 454 C.I.D. Bare Engine Blocks 19170538

Engine Block, Cast Iron, 4-Bolt Mains, 4.250 in. Diameter Bore, 1-Piece Rear Main Seal, Chevy, Big Block, Each

Part Number: NAL-19170538

4.89 out of 5 stars ( 9 )

Estimated Ship Date: Monday 4/28/2025

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Estimated Ship Date: Monday 4/28/2025

Summit Racing™ SPC Engine Blocks SUM-150200

Engine Block, 350 Chevy Small Block, Class 35 German Cast Iron, 4-Bolt 350 Mains, 4.000 in. Unfinished Bore Diameter, 2-Piece Rear Main Seal

Part Number: SUM-150200

5.0 out of 5 stars ( 5 )

Estimated Ship Date: Monday 4/28/2025

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Estimated Ship Date: Monday 4/28/2025

Dart SHP Special High Performance Small Block Chevy Cast Iron Bare Blocks 31162211

Engine Block, Cast Iron, 400 Mains, 4.115 in. Bore, 2-Piece Rear Main Seal, Chevy, Small Block, Each

Part Number: DRT-31162211

4.25 out of 5 stars ( 4 )

Estimated Ship Date: Monday 4/28/2025

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Estimated Ship Date: Monday 4/28/2025

Dart SHP Special High Performance Small Block Chevy Cast Iron Bare Blocks 31161211

Engine Block, Cast Iron, 4-Bolt Mains, 4.125 in. Diameter Bore, 2-Piece Rear Main Seal, Chevy, Small Block, Each

Part Number: DRT-31161211

4.75 out of 5 stars ( 8 )

Estimated Ship Date: Monday 4/28/2025

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Estimated Ship Date: Monday 4/28/2025

Summit Racing™ SPC Engine Blocks SUM-150203

Engine Block, 350 Chevy Small Block, Class 35 German Cast Iron, 4-Bolt 350 Mains, 4.000 in. Unfinished Bore Diameter, 1-Piece Rear Main Seal

Part Number: SUM-150203

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 4/28/2025

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Estimated Ship Date: Monday 4/28/2025

Dart Big M Sportsman Big Block Chevy Cast Iron Bare Blocks 31223444

Engine, Bare Block, Big M Sportsman, Stock/OEM, 4.50 in. Bore, Cast Iron, 4-Bolt Main, 2-Piece Rear Main Seal, Chevy, Big Block, Each

Part Number: DRT-31223444

Not Yet Reviewed

Estimated Ship Date: Monday 4/28/2025

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Estimated Ship Date: Monday 4/28/2025

Dart LS Next Cast Iron Bare Blocks 31867211

Engine Block, SHP LS Next, Bare Block, 4.125 in Bore, 9.240 Deck, 4-Bolt Mains, Cast Iron, GM LS-Series, Each

Part Number: DRT-31867211

Not Yet Reviewed

Estimated Ship Date: Monday 4/28/2025

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Estimated Ship Date: Monday 4/28/2025

Ford Performance Parts 460 C.I.D. Siamese Bore Engine Blocks M-6010-A460X

Engine Block, Cast Iron, 4-Bolt Mains, 4.360 in. Diameter Bore, 2-Piece Rear Main Seal, Siamese Bore, Ford, Big Block, Each

Part Number: FMS-M-6010-A460X

Not Yet Reviewed

Estimated Ship Date: Monday 4/28/2025

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Estimated Ship Date: Monday 4/28/2025

Callies Mopar Engine Blocks P5160208AA

Bare Blocks, Cast Iron, OEM Style, Standard 10.725 in. Deck, 4.495 in Pre Finished Bore, Main Caps, Main Bearings, Mopar, Each

Part Number: CPI-P5160208AA

Not Yet Reviewed

Estimated Ship Date: Jul 22, 2025 if ordered today

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Estimated Ship Date: Jul 22, 2025 if ordered today

Dart SHP Special High Performance Small Block Ford Cast Iron Bare Blocks 31375235

Engine Block, Cast Iron , 4-Bolt Mains, 4.125 in. Bore, 1-Piece Rear Main Seal, Ford 351, Small Block, Each

Part Number: DRT-31375235

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 4/28/2025

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Estimated Ship Date: Monday 4/28/2025

Ford Performance Parts Boss 302 Engine Blocks M-6010-BOSS302

Engine Block, Cast Iron, 4-Bolt Mains, 4.000 in. Diameter Bore, 1-Piece Rear Main Seal, Ford, Small Block, Each

Part Number: FMS-M6010BOSS302

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 4/28/2025

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Estimated Ship Date: Monday 4/28/2025

Callies Mopar Engine Blocks P5160210AA

Bare Blocks, Mopar Gen II Hemi Engine Block, Cast Iron, Aftermarket, Standard Deck, 4.245 in. Cylinder Bore, Chrysler, Dodge, Plymouth, 426 Hemi, Each

Part Number: CPI-P5160210AA

Not Yet Reviewed

Estimated Ship Date: Jul 22, 2025 if ordered today

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Estimated Ship Date: Jul 22, 2025 if ordered today

Ford Performance Parts 460 C.I.D. Siamese Bore Engine Blocks M-6010-A460XBB

Engine Blocks, Bare, 460 C.I.D. Siamese Bore, Cast Iron, Standard Deck Height, Ford 385 Series Main Journal Type, Ford, Each

Part Number: FMS-M6010A460XBB

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 4/28/2025

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Estimated Ship Date: Monday 4/28/2025

Callies Mopar Engine Blocks P5160212AA

Bare Blocks, Cast Iron, OEM Style, Standard 10.725 in. Deck, 4.310 in Pre Finished Bore, Main Caps, Main Bearings, Mopar, Each

Part Number: CPI-P5160212AA

Not Yet Reviewed

Estimated Ship Date: Monday 4/28/2025

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Estimated Ship Date: Monday 4/28/2025

World Products Merlin IV Engine Blocks 091111

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

Not Yet Reviewed

Estimated Ship Date: May 28, 2025 if ordered today

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Estimated Ship Date: May 28, 2025 if ordered today

World Products 351 Ford Man O'War Blocks 087172

Engine Block, Cast Iron, 4-Bolt Mains, 3.990 in. Diameter Bore, 1-Piece Rear Main Seal, Ford, Small Block, Each

Part Number: WRL-087172

5.0 out of 5 stars ( 3 )

Estimated Ship Date: May 28, 2025 if ordered today

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Estimated Ship Date: May 28, 2025 if ordered today

Dart Iron Eagle Mopar Gen III Cast Iron Bare Blocks 31622311

Engine Block, Cast Iron, 4-Bolt Mains, 4.125 in. Bore, 1-Piece Rear Seal, VVT, Dodge, RAM, Hemi, Gen III, Each

Part Number: DRT-31622311

Not Yet Reviewed

Estimated Ship Date: Monday 4/28/2025

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Estimated Ship Date: Monday 4/28/2025

World Products Merlin IV Engine Blocks 091117

Engine Block, Cast Iron, 4-Bolt Mains, 4.595 in. Diameter Bore, 10.250 in. Deck, Nodular Iron Main Cap, 2-Piece Rear Main Seal, Chevy, Big Block, Each

Part Number: WRL-091117

Not Yet Reviewed

Estimated Ship Date: May 28, 2025 if ordered today