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Autolite

Autolite Copper Core Spark Plugs

4.81 out of 5 stars 164 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.

Showing In Stock Items. Show All 8 Items.

Results 1 - 8 of 8

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 3/30/2026 if shipped by air

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Estimated Ship Date: Monday 3/30/2026 if shipped by air

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 ( 13 )

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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Estimated Ship Date: Monday 3/30/2026 if shipped by air

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 3/30/2026 if shipped by air

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Estimated Ship Date: Monday 3/30/2026 if shipped by air

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 3/30/2026 if shipped by air

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Estimated Ship Date: Monday 3/30/2026 if shipped by air

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 3/30/2026 if shipped by air

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Estimated Ship Date: Monday 3/30/2026 if shipped by air

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 3/30/2026 if shipped by air

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Estimated Ship Date: Monday 3/30/2026 if shipped by air

Autolite Copper Core Spark Plugs 145

Autolite Copper Core Spark Plugs 145

Autolite Copper Core Spark Plugs 145

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

Part Number: ATL-145

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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Estimated Ship Date: Monday 3/30/2026 if shipped by air

Autolite Copper Core Spark Plugs 685

Autolite Copper Core Spark Plugs 685

Autolite Copper Core Spark Plugs 685

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

Part Number: ATL-685

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 3/30/2026 if shipped by air

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Estimated Ship Date: Monday 3/30/2026 if shipped by air

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