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Autolite

Autolite Copper Core Spark Plugs

4.82 out of 5 stars 238 Customer Reviews

Autolite copper core spark plugs feature a cold-formed steel shell with precision-rolled threads, a full copper core electrode for better performance, and a one-piece terminal post to add strength. The ignition plugs use a copper-glass seal that bonds the insulator and terminal post center electrode together. This ensures full voltage at the spark gap and a 100 percent leak-proof, gas-tight seal. Autolite features an extensive application guide to cover just about everything with an internal combustion engine. Keep your engine running smoothly and reliably with Autolite replacement copper core spark plugs.

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Autolite Copper Core Spark Plugs 3924

Autolite Copper Core Spark Plugs 3924

Autolite Copper Core Spark Plugs 3924

Spark Plug, Copper, 14mm Thread, 0.750 in. Reach, Gasket Seat, 5/8 in. Wrench Size, Each

Part Number: ATL-3924

4.82 out of 5 stars ( 61 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Autolite Copper Core Spark Plugs 45

Autolite Copper Core Spark Plugs 45

Autolite Copper Core Spark Plugs 45

Spark Plug, Copper Core, Resistor, 18mm x 1.50, Tapered Seat, 0.438 in, Reach, Each

Part Number: ATL-45

4.94 out of 5 stars ( 16 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Autolite Copper Core Spark Plugs 25

Autolite Copper Core Spark Plugs 25

Autolite Copper Core Spark Plugs 25

Spark Plug, Copper Core, Tapered Seat, 14mm Thread, .460 in. Reach, Partial Projected, Resistor, Each

Part Number: ATL-25

4.82 out of 5 stars ( 17 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Autolite Copper Core Spark Plugs 3923

Autolite Copper Core Spark Plugs 3923

Autolite Copper Core Spark Plugs 3923

Spark Plug, Copper Core, Gasket Seat, 14mm Thread, .750 in. Reach, Projected Tip, Resistor, Each

Part Number: ATL-3923

4.42 out of 5 stars ( 12 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Autolite Copper Core Spark Plugs 85

Autolite Copper Core Spark Plugs 85

Autolite Copper Core Spark Plugs 85

Spark Plug, Copper Core, Resistor, 14mm x 1.25, Gasket Seat, 0.375 in, Reach, Each

Part Number: ATL-85

5.0 out of 5 stars ( 5 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Autolite Copper Core Spark Plugs 26

Autolite Copper Core Spark Plugs 26

Autolite Copper Core Spark Plugs 26

Spark Plug, Copper Core, Resistor, 14mm x 1.25, Tapered Seat, 0.431 in, Reach, Each

Part Number: ATL-26

5.0 out of 5 stars ( 12 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Autolite Copper Core Spark Plugs 104

Autolite Copper Core Spark Plugs 104

Autolite Copper Core Spark Plugs 104

Spark Plug, Copper Core, Tapered Seat, 14mm Thread, .708 in. Reach, Projected Tip, Resistor, Each

Part Number: ATL-104

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Autolite Copper Core Spark Plugs 24

Autolite Copper Core Spark Plugs 24

Autolite Copper Core Spark Plugs 24

Spark Plug, Copper Core, Tapered Seat, 14mm Thread, .460 in. Reach, Projected Tip, Resistor, Each

Part Number: ATL-24

4.64 out of 5 stars ( 11 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Autolite Copper Core Spark Plugs 3922

Autolite Copper Core Spark Plugs 3922

Autolite Copper Core Spark Plugs 3922

Spark Plug, Copper Core, Resistor, 14mm x 1.25, Gasket Seat, 0.750 in, Reach, Each

Part Number: ATL-3922

5.0 out of 5 stars ( 10 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Autolite Copper Core Spark Plugs 3926

Autolite Copper Core Spark Plugs 3926

Autolite Copper Core Spark Plugs 3926

Spark Plug, Copper Core, Resistor, 14mm x 1.25, Gasket Seat, 0.750 in, Reach, Each

Part Number: ATL-3926

4.83 out of 5 stars ( 12 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Autolite Copper Core Spark Plugs 65

Autolite Copper Core Spark Plugs 65

Autolite Copper Core Spark Plugs 65

Spark Plug, Copper Core, Resistor, 14mm x 1.25, Gasket Seat, 0.750 in, Reach, Each

Part Number: ATL-65

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Autolite Copper Core Spark Plugs 46

Autolite Copper Core Spark Plugs 46

Autolite Copper Core Spark Plugs 46

Spark Plug, Copper Core, Resistor, 18mm x 1.50, Tapered Seat, 0.438 in, Reach, Each

Part Number: ATL-46

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Autolite Copper Core Spark Plugs 86

Autolite Copper Core Spark Plugs 86

Autolite Copper Core Spark Plugs 86

Spark Plug, Copper Core, Resistor, 14mm x 1.25, Tapered Seat, 0.372 in, Reach, Each

Part Number: ATL-86

4.8 out of 5 stars ( 10 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Autolite Copper Core Spark Plugs 216

Autolite Copper Core Spark Plugs 216

Autolite Copper Core Spark Plugs 216

Spark Plug, Copper Core, Gasket Seat, 14mm Thread, .437 in. Reach, Non-Projected Tip, Non-Resistor, Each

Part Number: ATL-216

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Autolite Copper Core Spark Plugs 303

Autolite Copper Core Spark Plugs 303

Autolite Copper Core Spark Plugs 303

Spark Plug, Copper Core, Gasket Seat, 14mm Thread, 0.375 in. Reach, Resistor, Each

Part Number: ATL-303

5.0 out of 5 stars ( 6 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Autolite Copper Core Spark Plugs 605

Autolite Copper Core Spark Plugs 605

Autolite Copper Core Spark Plugs 605

Spark Plug, Copper Core, Resistor, 14mm x 1.25, Tapered Seat, 0.679 in, Reach, Each

Part Number: ATL-605

5.0 out of 5 stars ( 5 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Autolite Copper Core Spark Plugs 66

Autolite Copper Core Spark Plugs 66

Autolite Copper Core Spark Plugs 66

Spark Plug, Copper Core, Resistor, 14mm x 1.25, Gasket Seat, 0.750 in, Reach, Each

Part Number: ATL-66

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Autolite Copper Core Spark Plugs 386

Autolite Copper Core Spark Plugs 386

Autolite Copper Core Spark Plugs 386

Spark Plug, Copper Core, Gasket Seat, 18mm Thread, 0.500 in. Reach, Resistor, Each

Part Number: ATL-386

Not Yet Reviewed

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Autolite Copper Core Spark Plugs 103

Autolite Copper Core Spark Plugs 103

Autolite Copper Core Spark Plugs 103

Spark Plug, Copper Core, Tapered Seat, 14mm Thread, .708 in. Reach, Projected Tip, Resistor, Each

Part Number: ATL-103

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Autolite Copper Core Spark Plugs 404

Autolite Copper Core Spark Plugs 404

Autolite Copper Core Spark Plugs 404

Spark Plug, Copper Core, Gasket Seat, 14mm Thread, 0.750 in. Reach, Resistor, Each

Part Number: ATL-404

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Autolite Copper Core Spark Plugs 985

Autolite Copper Core Spark Plugs 985

Autolite Copper Core Spark Plugs 985

Spark Plug, Copper Core, Resistor, 14mm x 1.25, Gasket Seat, 0.750 in, Reach, Each

Part Number: ATL-985

4.0 out of 5 stars ( 4 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Autolite Copper Core Spark Plugs 124

Autolite Copper Core Spark Plugs 124

Autolite Copper Core Spark Plugs 124

Spark Plug, Copper Core, Resistor, Tapered Seat Style, 18mm Thread, 0.460 in. Reach, Dodge, Ford, Each

Part Number: ATL-124

3.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Autolite Copper Core Spark Plugs 295

Autolite Copper Core Spark Plugs 295

Autolite Copper Core Spark Plugs 295

Spark Plug, Copper Core, Gasket Seat, 14mm Thread, .375 in. Reach, Partial Projected Tip, Non-Resistor, Each

Part Number: ATL-295

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Autolite Copper Core Spark Plugs 5224

Autolite Copper Core Spark Plugs 5224

Autolite Copper Core Spark Plugs 5224

Spark Plug, Copper Core, Gasket Seat, 14mm Thread, .750 in. Reach, Projected Tip, Resistor, Each

Part Number: ATL-5224

4.88 out of 5 stars ( 8 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

Autolite Copper Core Spark Plugs 3076

Autolite Copper Core Spark Plugs 3076

Autolite Copper Core Spark Plugs 3076

Spark Plug, Copper Core, Gasket Seat, 7/8-18 in. Thread, 0.625 in. Reach, Each

Part Number: ATL-3076

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 9/22/2025

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Estimated Ship Date: Monday 9/22/2025

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