HARLEY-DAVIDSON Spark Plugs

Spark Plug, E3, Gasket Seat, 10mm Thread, 0.750 in. Reach, Non-Projected Tip, Resistor, Each

Part Number: ETP-E338

4.89 out of 5 stars ( 9 )

Estimated Ship Date: Today

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

Part Number: ATL-4164

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Spark Plugs, Double Platinum Power Spark Plugs - Boxed

Part Number: CPN-7322

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Spark Plug, N12YC, Copper Plus, 14mm Thread, .750 in. Reach, Projected Tip, Non-Resistor, Each

Part Number: CPN-38

4.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

Spark Plug, Iridium IX, Iridium, 12mm Thread, 0.750 in. Reach, Flat Seat, 5/8 in. Wrench Size, Each

Part Number: NGK-97181

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Spark Plug, Copper Plus, Gasket Seat, Nickel Alloy, 14mm Thread, 0.438 in. Reach, Each

Part Number: CPN-844

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

Spark Plug, D16, Industrial and Agricultural, 18mm Thread, .500 in. Reach, Non-Resistor, Each

Part Number: CPN-516

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

Part Number: NGK-2115

3.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

Spark Plug, Copper Plus, 12mm Thread, .750 in. Reach, Resistor, Each

Part Number: CPN-810

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Spark Plug, XS Xtreme Sport, Iridium, 14mm Thread, 0.750 in. Reach, Flat Seat, 13/16 in. Wrench Size, Each

Part Number: ATL-XS65

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Spark Plug, Powersports, Nickel Alloy, Copper, Gasket Seat, 0.750 in. Reach, 10mm Thread Size, Three Ground Strap, Each

Part Number: ETP-E3-39

5.0 out of 5 stars ( 6 )

Estimated Ship Date: Today

Spark Plug, E3, Gasket Seat, 14mm Thread, 0.750 in. Reach, Non-Projected Tip, Resistor, Each

Part Number: ETP-E3-31

5.0 out of 5 stars ( 7 )

Estimated Ship Date: Today

Spark Plug, E3, Gasket Seat, 12mm Thread, 0.750 in. Reach, Projected Tip, Resistor, Each

Part Number: ETP-E3-36

4.78 out of 5 stars ( 9 )

Estimated Ship Date: Today

Spark Plug, XP Xtreme Performance, Iridium, 12mm Thread, 0.750 in. Reach, Gasket Seat, 11/16 in. Wrench Size, Each

Part Number: ATL-XS4164

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Spark Plug, Iridium IX, Iridium, 14mm Thread, 0.927 in. Reach, Flat Seat, 13/16 in. Wrench Size, Each

Part Number: NGK-95525

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

Part Number: NGK-2298

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Spark Plug, XS Xtreme Sport, Iridium, 12mm Thread, 0.750 in. Reach, Gasket Seat, 11/16 in. Wrench Size, Each

Part Number: ATL-XS4162

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Spark Plug, Standard, 14mm Thread, .750 in. Reach, 13/16 in. Hex, Gasket Seat, Resistor, Each

Part Number: NGK-7634

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Spark Plug, Laser Iridium, Gasket Seat, 12mm Thread Size, 0.750in. Reach, Resistor, Each

Part Number: NGK-5477

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Estimated Ship Date: Today

Spark Plug, E3, Gasket Seat, 14mm Thread, 0.750 in. Reach, Projected Tip, Resistor, Each

Part Number: ETP-E3-34

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

Spark Plugs, Platinum Tip, 12mm Thread Size, Harley-Davidson®, Pair

Part Number: ALM-Y2418P

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Feb 17, 2026 if ordered today

• Drop Ship
• Special Order

Spark Plug, Iridium, Iridium, 12mm Thread, 0.750 in. Reach, Flat Seat, 5/8 in. Wrench Size, Each

Part Number: CPN-9701

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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

Part Number: ATL-4265

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Spark Plug, RN4C, Copper Plus, 14mm Thread, .750 in. Reach, Resistor, Each

Part Number: CPN-104

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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

Part Number: ATL-4275

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