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Results 1 - 25 of 86

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 7/14/2025

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Estimated Ship Date: Monday 7/14/2025

This product may not be eligible for select promotional offers

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 7/14/2025

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Estimated Ship Date: Monday 7/14/2025

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Engine Block, Cast Iron , 4-Bolt Mains, 4.125 in. Bore, 1-Piece Rear Main Seal, Ford 302, Small Block, Each

Part Number: DRT-31374275

Not Yet Reviewed

Estimated Ship Date: Monday 7/14/2025

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Estimated Ship Date: Monday 7/14/2025

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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 7/14/2025

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Estimated Ship Date: Monday 7/14/2025

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Engine Block, 400 Chevy Small Block, Class 35 German Cast Iron, 4-Bolt 350 Mains, 4.125 in. Unfinished Bore Diameter, 1-Piece Rear Main Seal

Part Number: SUM-150204

Not Yet Reviewed

Estimated Ship Date: Monday 7/14/2025

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Estimated Ship Date: Monday 7/14/2025

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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 7/14/2025

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Estimated Ship Date: Monday 7/14/2025

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Engine Block, Pro LS, Bare, Cast Iron, 6-bolt Main Bolt Style, 9.240 in. Standard Deck, Chevrolet, Each

Part Number: SUM-150216

Not Yet Reviewed

Estimated Ship Date: Monday 7/14/2025

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Estimated Ship Date: Monday 7/14/2025

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Engine Block, Aluminum, 6-Bolt Mains, 4.125 in. Diameter Bore, 1-Piece Rear Main Seal, Chevy, LS, Each

Part Number: RHS-54903U

Not Yet Reviewed

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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 7/14/2025

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Estimated Ship Date: Monday 7/14/2025

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Engine Block, Aluminum, Billet Steel Main Caps, 4.125 Bore, 9.25 in. Deck Height, Drag Pak, Mopar, Each

Part Number: CPI-P5160272AA

Not Yet Reviewed

Estimated Ship Date: Monday 7/14/2025

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Estimated Ship Date: Monday 7/14/2025

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Engine Block, Aluminum, 4-Bolt Cleveland Mains, 4.115 in. Dia. Bore, 1-Piece Rear Main Seal, Ford, 5.8L, Each

Part Number: FMS-M-6010-Z351

4.5 out of 5 stars ( 2 )

Estimated Ship Date: Aug 11, 2025 if ordered today

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Estimated Ship Date: Aug 11, 2025 if ordered today

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Engine Block, Cast Iron, 4-Bolt Mains, 4.115 in. Diameter Bore, 1-Piece Rear Main Seal, Ford, Small Block, Each

Part Number: WRL-087182

Not Yet Reviewed

Estimated Ship Date: Monday 7/14/2025

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Estimated Ship Date: Monday 7/14/2025

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Engine Block, Cast Iron, 4-Bolt Mains, 4.115 in. Diameter Bore, 2-Piece Rear Main Seal, Chevy, Small Block, Each

Part Number: WRL-084030

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Aug 12, 2025 if ordered today

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Estimated Ship Date: Aug 12, 2025 if ordered today

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Bare Blocks, Dart SHP Pro Series, Cast Iron, 9.025 in. Deck Height, 4.125 in. Bore, 4-Bolt Main, 2 Piece Rear Main Seal, Small Block, Chevy,Each

Part Number: DRT-31162212

Not Yet Reviewed

Estimated Ship Date: Aug 15, 2025 if ordered today

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Estimated Ship Date: Aug 15, 2025 if ordered today

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Cylinder Block, Boss 302, 8.200 in. Deck, 4.115 in. Rough Bore, Each

Part Number: FMS-M6010B302BB

Not Yet Reviewed

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Engine Block, Cast Iron, 4-Bolt Mains, 4.115 in. Diameter Bore, 1-Piece Rear Main Seal, Ford, Small Block, Each

Part Number: WRL-087120

Not Yet Reviewed

Estimated Ship Date: Monday 7/14/2025

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Estimated Ship Date: Monday 7/14/2025

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Bare Blocks, Dart Little M Series, Cast Iron, 9.500 in. Deck Height, 4.125 in. Bore, 4-Bolt Main, 2-Piece Rear Main Seal, Small Block, Chevy, Each

Part Number: DRT-31181235

Not Yet Reviewed

Estimated Ship Date: Monday 7/14/2025

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Estimated Ship Date: Monday 7/14/2025

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Bare Blocks, Dart Little M Series, Cast Iron, 9.500 in. Deck Height, 4.125 in. Bore, 4-Bolt Main, 2-Piece Rear Main Seal, Small Block, Chevy, Each

Part Number: DRT-31182235

Not Yet Reviewed

Estimated Ship Date: Monday 7/14/2025

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Estimated Ship Date: Monday 7/14/2025

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Engine Block, Aluminum, Billet Steel Main Caps, 4.125 Bore, 9.25 in. Deck Height, Hellephant, Mopar, Each

Part Number: CPI-P5160271AA

Not Yet Reviewed

Estimated Ship Date: Monday 7/14/2025

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Estimated Ship Date: Monday 7/14/2025

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

Part Number: DRT-31161211L

Not Yet Reviewed

Estimated Ship Date: Monday 7/14/2025

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Estimated Ship Date: Monday 7/14/2025

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MOTOWN SBC, 9.025" x 4.120" x 400 mains, billet splayed caps - Raised Camshaft - .842" Bushing

Part Number: WRL-084130RC

Not Yet Reviewed

Estimated Ship Date: Aug 12, 2025 if ordered today

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Estimated Ship Date: Aug 12, 2025 if ordered today

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Engines, Bare Blocks, SBC Motown Block, 400 Mains, 9.025 in. Deck Height, 4-bolt Main Bolt Style, Chevrolet, V8, Chevy Small Block Gen I, Each

Part Number: WRL-084130RC-904

Not Yet Reviewed

Estimated Ship Date: Aug 12, 2025 if ordered today

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Estimated Ship Date: Aug 12, 2025 if ordered today

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Engine Block, Ford Man O'War, 302 c.i.d., Cast Iron, 302 Mains, 8.2 in. Deck Height, 1-piece Rear Main Style

Part Number: WRL-087010

Not Yet Reviewed

Estimated Ship Date: Aug 12, 2025 if ordered today

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Estimated Ship Date: Aug 12, 2025 if ordered today

This product may not be eligible for select promotional offers

Engine Block, Cast Iron, 4-Bolt Mains, 4.115 in. Diameter Bore, 1-Piece Rear Main Seal, Ford, Small Block, Each

Part Number: WRL-087160

Not Yet Reviewed

Estimated Ship Date: Aug 12, 2025 if ordered today

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Estimated Ship Date: Aug 12, 2025 if ordered today

This product may not be eligible for select promotional offers

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