1991 Engine Blocks & Accessories Engines & Components - In Stock Filter Options - Vendor In Stock Filter Options - Free Shipping on Orders Over $109 at Summit Racing

Melling Cylinder Sleeves 590297

Melling Cylinder Sleeves 590297

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

Part Number: MEL-590297

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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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PRW Main Girdle Stud Kits 1000205

FORD 351W, Stud Kit, Main Girdle, Includes 10ea, 1/2" Longer Studs, 1/2" - 13/20 x 5.00" Studs, PRW Fasteners & Hardware.

Part Number: PQX-1000205

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Estimated Ship Date: Feb 25, 2026 if ordered today

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Estimated Ship Date: Feb 25, 2026 if ordered today

Melling Engine Expansion Plug Kits MPE-185BR

Freeze Plug Kits Bagged - Brass

Part Number: MEL-MPE-185BR

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PRW Billet Steel Main Girdles 9034700

Main Cap Girdle, 1045 Billet Steel, with PRW SCM-4135 Fasteners/Hardware, Black Oxide Finish, Buick, Chevy, GMC, Oldsmobile, Pontiac, Each

Part Number: PQX-9034700

5.0 out of 5 stars ( 1 )

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Trick Flow® Main Cap Fastener Replacement Hardware Kits TFS-5150R700-HK

Replacement, Hardware Kit, 2-Bolt Main, Ford, with Trick Flow® Main Cap Girdle,

Part Number: TFS-5150R700-HK

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Melling Engine Expansion Plug Kits MPE-137BR

Freeze Plug Kits Bagged - Brass

Part Number: MEL-MPE-137BR

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Dorman Expansion Plugs 02663

Engine Expansion Plugs, Pipe Plugs, Ford, Kit

Part Number: RNB-02663

4.5 out of 5 stars ( 2 )

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Dorman Expansion Plugs 555-018

Engine Expansion Plug, Steel, 1.007 in. Closed End Diameter, 1.021 in. Open End Diameter, Set of 10

Part Number: RNB-555-018

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Dorman Expansion Plugs 555-069

Expansion Plugs, Steel, Diameter 2.015 in., Various, Each

Part Number: RNB-555-069

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Dorman Expansion Plugs 555-004

Freeze Plugs, Steel, 29/64 in. Diameter, Steel, Shallow Cup, Ford, Jeep, Set of 10

Part Number: RNB-555-004

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Dorman Expansion Plugs 02651

Freeze Plugs, Steel, Chrysler, Dodge, Plymouth, 318, 360, Kit

Part Number: RNB-02651

5.0 out of 5 stars ( 1 )

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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 )

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Dorman Expansion Plugs 565-017

Freeze Plugs, Brass, 1.000 in. Diameter, Buick, Cadillac, Chevy, GMC, Oldsmobile, Pontiac, Jaguar, Set of 10

Part Number: RNB-565-017

5.0 out of 5 stars ( 1 )

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Philadelphia Racing Products AN Block Adapters PRP-6861

AN Block Adapters, -16 AN Adapters, Clear Anodized, Chevy, Big Block, Kit

Part Number: PGP-PRP-6861

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Estimated Ship Date: Jan 16, 2026 if ordered today

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Estimated Ship Date: Jan 16, 2026 if ordered today

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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Dorman Expansion Plugs 555-084

Engine Expansion Plugs, Steel, Ford, Mercury, Set of 10

Part Number: RNB-555-084

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Crown Automotive Main Cap Fasteners J4006948

Main Cap Fastener, Bolt, Hex, 1/2-13 in. Thread, 3 in. Length, Steel, Black Oxide, Jeep, Each

Part Number: CWA-J4006948

1.0 out of 5 stars ( 1 )

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Dorman Expansion Plugs 557-017

Freeze Plugs, Steel, AMC, Jeep, International, Set of 7

Part Number: RNB-557-017

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Milodon Main Stud Kits 81115

Main Studs, Straight 4-Bolt Main, Chevy, 350, 400, Kit

Part Number: MIL-81115

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Mar 25, 2026 if ordered today

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Estimated Ship Date: Mar 25, 2026 if ordered today

Need It Sooner? We recommend these similar substitute parts:

ARP High Performance Series Main Bolts 134-5202

4.75 out of 5 stars ( 36 )

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Dorman Expansion Plugs 555-104

Expansion Plugs, Steel, Buick, Cadillac, Chevy, GMC, Oldsmobile, Pontiac, Isuzu, Jeep, Set of 10

Part Number: RNB-555-104

4.8 out of 5 stars ( 5 )

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Pioneer Performance Freeze Plugs 830001

Freeze Plug Kit, Brass, Chevy, Small Block, 267-350, Kit

Part Number: PIO-830001

5.0 out of 5 stars ( 7 )

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Dorman Expansion Plugs 555-077

Expansion Plugs, Steel, Diameter 1.513 in., Various, Each

Part Number: RNB-555-077

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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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Philadelphia Racing Products AN Block Adapters PRP-6862

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

Part Number: PGP-PRP-6862

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Estimated Ship Date: Jan 15, 2026 if ordered today

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Estimated Ship Date: Jan 15, 2026 if ordered today