1966 GMC | Summit Racing

Cometic MLS Head Gaskets C5405-040

Cometic MLS Head Gaskets C5405-040

Head Gaskets, 4.125 in. Bore, .040 in. Compressed Thickness, Chevy, Small Block, Each

Part Number: CGT-C5405-040

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

Cometic MLS Head Gaskets C5407-027

Head Gasket, MLS, 4.160 in. Bore, .027 in. Compressed Thickness, Chevy, Each

Part Number: CGT-C5407-027

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

Cometic Timing Cover Seals C5376

Engine Timing Cover Seal

Part Number: CGT-C5376

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

Cometic MLS Head Gaskets C5401-027

Head Gasket, MLS, 4.135 in. Bore, .027 in. Compressed Thickness, Chevy, Each

Part Number: CGT-C5401-027

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

Cometic MLS Head Gaskets C5401-036

Head Gasket, MLS, 4.135 in. Bore, .036 in. Compressed Thickness, Chevy, Each

Part Number: CGT-C5401-036

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

Cometic MLS Head Gaskets C5410-045

Head Gasket, MLS, 4.165 in. Bore, .045 in. Compressed Thickness, Chevy, Each

Part Number: CGT-C5410-045

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

Cometic MLS Head Gaskets C5408-036

.036" MLS- BD2000 HEADS

Part Number: CGT-C5408-036

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

Cometic MLS Head Gaskets C5271-051

Head Gasket, MLS, 4.125 in. Bore, .051 in. Compressed Thickness, Chevy, Each

Part Number: CGT-C5271-051

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

Hastings Premium Ductile Ring Sets 2C667060

Engine Piston Ring Set, 6-Cyl Ring Set; Triple Chrome

Part Number: HSN-2C667060

Not Yet Reviewed

Estimated Ship Date: May 11, 2026 if ordered today

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Estimated Ship Date: May 11, 2026 if ordered today

Cometic MLS Head Gaskets C5247-034

Head Gasket, MLS, 4.125 in. Bore, .034 in. Compressed Thickness, Chevy, Each

Part Number: CGT-C5247-034

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

Cometic MLS Head Gaskets C5400-030

Head Gasket, MLS, 4.125 in. Bore, .030 in. Compressed Thickness, Chevy, Each

Part Number: CGT-C5400-030

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

Cometic MLS Head Gaskets C5401-045

Head Gasket, MLS, 4.135 in. Bore, .045 in. Compressed Thickness, Chevy, Each

Part Number: CGT-C5401-045

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

Cometic MLS Head Gaskets C5401-030

Head Gasket, MLS, 4.135 in. Bore, .030 in. Compressed Thickness, Chevy, Each

Part Number: CGT-C5401-030

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

Cometic MLS Head Gaskets C5215-051

.051" MLS H/G 4.270" BORE

Part Number: CGT-C5215-051

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

Cometic MLS Head Gaskets C5404-045

.045" MLS- BD2000 HEADS

Part Number: CGT-C5404-045

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

Auto Metal Direct Truck Bed Repair Panels 725-4060-6R

Truck Bed Repair Panel, Steel, Black EDP Coated, Bedside Patch, Passenger Side Lower Front, Chevy, GMC, Each

Part Number: AMD-725-4060-6R

Not Yet Reviewed

Estimated Ship Date: Jun 16, 2026 if ordered today

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Estimated Ship Date: Jun 16, 2026 if ordered today

Auto Metal Direct Truck Bed Repair Panels 725-4060-6L

Truck Bed Repair Panel, Steel, Black EDP Coated, Bedside Patch, Driver Side Lower Front, Chevy, GMC, Each

Part Number: AMD-725-4060-6L

Not Yet Reviewed

Estimated Ship Date: Jun 16, 2026 if ordered today

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Estimated Ship Date: Jun 16, 2026 if ordered today

Need It Sooner? We recommend these similar substitute parts:

Auto Metal Direct Truck Bed Repair Panels 720-4060-1L

Not Yet Reviewed

Estimated Ship Date: Monday 4/27/2026

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Brothers Trucks Door Sill Trim and Protectors SSSP101

60-66 CHVY/GMC DOOR SILL STEP PLATE-SS

Part Number: HCT-SSSP101

Not Yet Reviewed

Estimated Ship Date: Jun 12, 2026 if ordered today

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Estimated Ship Date: Jun 12, 2026 if ordered today

Silv-O-Lite Cast Pistons S1429.020

Piston, Cast, Dish, 3.895 in. Bore, 3/32 in., 3/32 in., 3/16 in. Ring Grooves, GM, L6, Each

Part Number: UEM-S1429-020

Not Yet Reviewed

Estimated Ship Date: Jun 2, 2026 if ordered today

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Estimated Ship Date: Jun 2, 2026 if ordered today

Call to Order

Enginetech Piston Ring Sets R35666-.50

Engine Piston Ring Set 53-67 CHV/GMC 3.2L/3.8L

Part Number: EGN-R3566650

Not Yet Reviewed

Estimated Ship Date: May 18, 2026 if ordered today

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Estimated Ship Date: May 18, 2026 if ordered today

Kanter Ball Joints BJ10187

Ball Joint, Greasable, Lower, Chevy, GMC, Each

Part Number: KAA-BJ10187

Not Yet Reviewed

Estimated Ship Date: May 18, 2026 if ordered today

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Estimated Ship Date: May 18, 2026 if ordered today

Enginetech Rebuilders Valves V1078B

Engine Intake Valve 55-95 BUI/CHV/GM/GMC/OLD/PON 2.5L/3.2L/3.5L/3.8L/4.1L/4.3L/4.4L/4.6L/4.8L/5.0L/5.3L/5.7L/6.6L

Part Number: EGN-V1078B

Not Yet Reviewed

Estimated Ship Date: May 18, 2026 if ordered today

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Estimated Ship Date: May 18, 2026 if ordered today

Fairchild Industries Weatherstrip Seals KG3105

Weatherstrip Seals, Front Door, Chevrolet, Pair

Part Number: FCD-KG3105

Not Yet Reviewed

Estimated Ship Date: May 8, 2026 if ordered today

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Estimated Ship Date: May 8, 2026 if ordered today

SCE MLS Spartan Head Gaskets M111351

Head Gasket, MLS Sparten, With Steam Holes, Multi-Layer Stainless Steel, 4.134 in. Bore, 0.051 in. Compressed Thickness, Chevrolet, Small Block, Each

Part Number: SCE-M111351

Not Yet Reviewed

Estimated Ship Date: Jun 8, 2026 if ordered today

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Estimated Ship Date: Jun 8, 2026 if ordered today

Energy Suspension Sway Bar Bushings 3.5148R

Sway Bar Bushings, Rear, Polyurethane, Red, 1 3/4 in. Diameter, Chevy, GMC, Set of 4

Part Number: ENS-3-5148R

Not Yet Reviewed

Estimated Ship Date: Jul 21, 2026 if ordered today

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Estimated Ship Date: Jul 21, 2026 if ordered today

1966 GMC Parts and Accessories