Autolite Copper Core Spark Plugs

4.78 out of 5 stars 175 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 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 )

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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 ( 13 )

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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 )

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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 )

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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

4.54 out of 5 stars ( 13 )

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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 ( 5 )

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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 )

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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 )

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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 )

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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 )

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Autolite Copper Core Spark Plugs 63

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

Part Number: ATL-63

5.0 out of 5 stars ( 1 )

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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

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Autolite Copper Core Spark Plugs 23

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

Part Number: ATL-23

5.0 out of 5 stars ( 2 )

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Autolite Copper Core Spark Plugs 5245

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

Part Number: ATL-5245

Not Yet Reviewed

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Autolite Copper Core Spark Plugs 847

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

Part Number: ATL-847

Not Yet Reviewed

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Autolite Copper Core Spark Plugs 666

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

Part Number: ATL-666

Not Yet Reviewed

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Autolite Copper Core Spark Plugs 106

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

Part Number: ATL-106

Not Yet Reviewed

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Autolite Copper Core Spark Plugs 606

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

Part Number: ATL-606

5.0 out of 5 stars ( 2 )

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