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.

Showing In Stock Items. Show All 14 Items.

Results 1 - 14 of 14

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 3/16/2026 if shipped by air

...Loading

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

...Loading

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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 3/16/2026 if shipped by air

...Loading

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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

4.89 out of 5 stars ( 9 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

...Loading

Estimated Ship Date: Monday 3/16/2026 if shipped by air

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 )

...Loading

Autolite Copper Core Spark Plugs A4164

Spark Plug, Copper Core, Gasket Seat, 12mm Thread, .750 in. Reach, Partial Projected, Resistor, Each

Part Number: ATL-4164

Not Yet Reviewed

Estimated Ship Date: Monday 3/16/2026 if shipped by air

...Loading

Estimated Ship Date: Monday 3/16/2026 if shipped by air

Autolite Copper Core Spark Plugs 64

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

Part Number: ATL-64

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 3/16/2026 if shipped by air

...Loading

Estimated Ship Date: Monday 3/16/2026 if shipped by air

Autolite Copper Core Spark Plugs A4265

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

Part Number: ATL-4265

Not Yet Reviewed

Estimated Ship Date: Monday 3/16/2026 if shipped by air

...Loading

Estimated Ship Date: Monday 3/16/2026 if shipped by air

Autolite Copper Core Spark Plugs 4302

Spark Plug, Copper Core, Gasket Seat, 10mm Thread, 0.750 in. Reach, Resistor, Each

Part Number: ATL-4302

Not Yet Reviewed

Estimated Ship Date: Monday 3/16/2026 if shipped by air

...Loading

Estimated Ship Date: Monday 3/16/2026 if shipped by air

Autolite Copper Core Spark Plugs 4062

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

Part Number: ATL-4062

Not Yet Reviewed

...Loading

Autolite Copper Core Spark Plugs 4063

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

Part Number: ATL-4063

Not Yet Reviewed

Estimated Ship Date: Monday 3/16/2026 if shipped by air

...Loading

Estimated Ship Date: Monday 3/16/2026 if shipped by air

Autolite Copper Core Spark Plugs 4303

Spark Plug, Copper Core, Gasket Seat, 10mm Thread, 0.750 in. Reach, Resistor, Each

Part Number: ATL-4303

Not Yet Reviewed

Estimated Ship Date: Monday 3/16/2026 if shipped by air

...Loading

Estimated Ship Date: Monday 3/16/2026 if shipped by air

Autolite Copper Core Spark Plugs for 1993-2000 KAF620 MULE 2520, KAF620 MULE 2510 4X4, 1994-2000 KAF620 MULE 2500 - 258

Spark Plug, Copper Core, Gasket Seat, 14mm Thread, .380 in. Reach, Non-Resistor, Each

Part Number: ATL-258

Not Yet Reviewed

Estimated Ship Date: Monday 3/16/2026 if shipped by air

...Loading

Estimated Ship Date: Monday 3/16/2026 if shipped by air

Autolite Copper Core Spark Plugs 2634

Spark Plug, Copper Core, Gasket Seat, 14mm Thread, .500 in. Reach, Non-Resistor, Each

Part Number: ATL-2634

Not Yet Reviewed

Estimated Ship Date: Monday 3/16/2026 if shipped by air

...Loading

Estimated Ship Date: Monday 3/16/2026 if shipped by air

Page 1 of 1