1991 Engine Blocks & Accessories Engines & Components

Dorman Expansion Plugs 555-055

Freeze Plugs, Steel, 2.50 in. Diameter, Set of 10

Part Number: RNB-555-055

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PRW Billet Steel Main Girdles 9045401

Main Cap Girdle, 1045 Billet Steel, No Hardware, for Chevy Big Block 454, Each

Part Number: PQX-9045401

Not Yet Reviewed

Estimated Ship Date: Jul 7, 2026 if ordered today

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Estimated Ship Date: Jul 7, 2026 if ordered today

Dart Big M Sportsman Big Block Chevy Cast Iron Bare Blocks 31223644

Dart Big M Sportsman Big Block Chevy Cast Iron Bare Blocks 31223644

Engine, Bare Block, Big M Sportsman, Stock/OEM, 4.60 in. Bore, Cast Iron, 4-Bolt Main, 2-Piece Rear Main Seal, Chevy, Big Block, Each

Part Number: DRT-31223644

Not Yet Reviewed

Estimated Ship Date: Jul 13, 2026 if ordered today

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Estimated Ship Date: Jul 13, 2026 if ordered today

Need It Sooner? We recommend these similar substitute parts:

Summit Racing™ SPC Big Block Chevy Engine Block SUM-150211

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Melling Engine Expansion Plug Kits MPE-137BR

Freeze Plug Kits Bagged - Brass

Part Number: MEL-MPE-137BR

Not Yet Reviewed

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Dorman Expansion Plugs 555-025

Freeze Plugs, Steel, Set of 10

Part Number: RNB-555-025

4.0 out of 5 stars ( 1 )

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PRW Main Cap Stud Kits 1000215

Main Cap Fasteners, Main Cap Girdle Stud Kits, 2-bolt, Stud Style, Hex Head, Nuts, Washers, Ford, Big Block FE, Big Block 385 Series, Kit

Part Number: PQX-1000215

3.0 out of 5 stars ( 2 )

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Ford Performance Parts Plug and Dowel Kits for 1985-1995 MUSTANG - M-6026-BOSS

Plug and Dowel Kit, Steel, Ford, Boss Block, Kit

Part Number: FMS-M-6026-BOSS

Not Yet Reviewed

Estimated Ship Date: Jun 1, 2026 if ordered today

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Estimated Ship Date: Jun 1, 2026 if ordered today

Engine Works Freeze Plug Sets 60154

STEEL CAM PLUGS BB CHEVY 366-454 CAM

Part Number: EW1-60154

Not Yet Reviewed

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World Products Main Stud Kits WPI701432

Main Studs, 4-Bolt Main, Man O'War, Billet Main Caps, Ford, Small Block Windsor, Kit

Part Number: WRL-701432

Not Yet Reviewed

Estimated Ship Date: Jun 9, 2026 if ordered today

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Estimated Ship Date: Jun 9, 2026 if ordered today

Dorman Expansion Plugs 555-034

Engine Expansion Plugs, Steel, Chevy, GMC, Set of 10

Part Number: RNB-555-034

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Dorman Expansion Plugs 555-036

Freeze Plugs, Steel, 1.765 in. Diameter, Set of 10

Part Number: RNB-555-036

4.0 out of 5 stars ( 3 )

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Melling Engine Expansion Plug Kits MPE-180BR

Freeze Plug Kits Bagged - Brass

Part Number: MEL-MPE-180BR

Not Yet Reviewed

Estimated Ship Date: May 29, 2026 if ordered today

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Estimated Ship Date: May 29, 2026 if ordered today

ACDelco GM Genuine Parts Main Bearing Cap Bolts 12561388

Main Cap Fasteners, ACDelco GM Genuine Parts Multi-Purpose Bolts, 7/16-14 Threads, Cadillac, Chevy, GMC, Olds, Pontiac, Each

Part Number: ADO-12561388

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Dorman Expansion Plugs 555-003

Freeze Plugs, Steel, 0.438 in. Diameter, Chevy, Chrysler, Dodge, Eagle, Ford, GMC, Jeep, Mercury, Set of 10

Part Number: RNB-555-003

5.0 out of 5 stars ( 3 )

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PRW Billet Steel Main Girdles 9035101

MAIN GIRDLE, BILLET STEEL, FORD 351W, Does Not incl Studs or Fasteners

Part Number: PQX-9035101

Not Yet Reviewed

Estimated Ship Date: Jul 7, 2026 if ordered today

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Estimated Ship Date: Jul 7, 2026 if ordered today

Philadelphia Racing Products AN Block Adapters PRP-6860

AN Block Adapters, -12 AN Adapters, Clear Anodized, Chevy, Big Block, Kit

Part Number: PGP-PRP-6860

Not Yet Reviewed

Estimated Ship Date: May 27, 2026 if ordered today

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Estimated Ship Date: May 27, 2026 if ordered today

Milodon Main Stud Kits 81129

Main Studs, 4-Bolt Main, Chevy, Large Journal, Small Block, with Milodon Caps, Windage Tray, Kit

Part Number: MIL-81129

Not Yet Reviewed

Estimated Ship Date: Jul 28, 2026 if ordered today

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Estimated Ship Date: Jul 28, 2026 if ordered today

Dorman Expansion Plugs for 1991-1995 C3500HD - 557-001

Expansion Plugs, Steel, 15 Expansion Plugs, 5 Pipe Plugs, Kit

Part Number: RNB-557-001

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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ARP Main Stud Kits 254-5601

Main Studs, 4-Bolt Main, Ford, R-Block, Ford, 302, R-Block, Kit

Part Number: ARP-254-5601

Not Yet Reviewed

Estimated Ship Date: Jun 1, 2026 if ordered today

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Estimated Ship Date: Jun 1, 2026 if ordered today

Summit Racing™ Main Stud Kits SUM-910205

Main Studs, 2-Bolt Main, 180,000 psi Yield Strength, Washers, Hex Nuts, Chevy, Small Block, Kit

Part Number: SUM-910205

2.67 out of 5 stars ( 3 )

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Pioneer Performance Freeze Plugs PE-137-BR

Freeze Plug Kit, Brass, Chevy, Pontiac, Buick, GMC, Oldsmobile, V6, Kit

Part Number: PIO-PE-137-BR

Not Yet Reviewed

Estimated Ship Date: May 19, 2026 if ordered today

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Estimated Ship Date: May 19, 2026 if ordered today

PRW Main Girdle Stud Kits 1000209

CHEV 454, Stud Kit, Main Girdle, Includes 10ea, 1/2" Longer Studs, 1/2"-13/20 x 5.313" Studs, PRW Fasteners & Hardware.

Part Number: PQX-1000209

Not Yet Reviewed

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Pioneer Performance Freeze Plugs PE-100-BR

Freeze Plug Kit, Brass, Chevy, Small Block, Kit

Part Number: PIO-PE100BR

Not Yet Reviewed

Estimated Ship Date: May 20, 2026 if ordered today

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Estimated Ship Date: May 20, 2026 if ordered today

Melling Performance Cylinder Sleeves CSL197HP

Cylinder Sleeve, Cast Iron, 4.250 in. Bore I.D., 0.094 in. Wall Thickness, 7.000 in. Length, Each

Part Number: MEL-CSL197HP

Not Yet Reviewed

Estimated Ship Date: May 29, 2026 if ordered today

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Estimated Ship Date: May 29, 2026 if ordered today

Chevrolet Performance Dowel Pins 9441003

Engine Block Dowel Pins, Rear Main Seal Housing, 1-Piece Rear Main, Chevrolet, Small Block Gen I, Each

Part Number: NAL-9441003

4.33 out of 5 stars ( 3 )

Estimated Ship Date: Today

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