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H-D® Spark Plugs

Trust Harley-Davidson when you're looking for the right replacement spark plugs for your bike. H-D spark plugs mean peak performance at all engine speeds. A full range of Harley-Davidson motorcycle spark plugs can be found, including top-of-the-line platinum and double-platinum spark plugs.

1 - 16 of 16
  • $ 27.89
    $ 27.89

    Screamin’ Eagle Performance Spark Plugs feature double platinum coating for superior erosion resistance and extended life. The “V” trimmed ground electrode reduces shrouding of the flame front to promote flame propagation, and the fine wire center electrode enhances startups and ignitability.

    • For Stock Compression Applications
    • Feature Ribbed Core Technology (RCT) that provides resistance to fouling
    • Designed with Original Equipment-style noise suppression to prevent electrical interference with radios and CB communication equipment
    • Works great in racing applications where rich air/fuel conditions are required
    • Designed for modified engines including performance carburetors, high-flow air cleaners, camshafts, exhaust systems and ignition systems in conjunction with stock compression ratios
    • Unique style with Screamin’ Eagle logo
    • Sold in pairs
  • $ 27.89
    $ 27.89

    Screamin’ Eagle Performance Spark Plugs feature double platinum coating for superior erosion resistance and extended life. The “V” trimmed ground electrode reduces shrouding of the flame front to promote flame propagation, and the fine wire center electrode enhances startups and ignitability.

    • For High Compression Applications
    • Feature Ribbed Core Technology (RCT) that provides resistance to fouling
    • Designed with Original Equipment-style noise suppression to prevent electrical interference with radios and CB communication equipment
    • Works great in racing applications where rich air/fuel conditions are required
    • Designed for high performance applications involving modifications in high-flow air cleaners, camshafts, exhaust, performance heads, ignition components, higher compression ratios above OE configurations or engines specific for racing applications
    • Unique style with Screamin’ Eagle logo
    • Sold in pairs
  • $ 24.04
    $ 24.04

    Screamin’ Eagle Performance Spark Plugs feature double platinum coating for superior erosion resistance and extended life. The “V” trimmed ground electrode reduces shrouding of the flame front to promote flame propagation, and the fine wire center electrode enhances startups and ignitability.

    • For Stock Compression Applications
    • Features Ribbed Core Technology (RCT) that provides resistance to fouling
    • Designed with Original Equipment-style noise suppression to prevent electrical interference with radios and CB communication equipment
    • Works great in racing applications where rich air/fuel conditions are required
    • Designed for modified engines including performance carburetors, high-flow air cleaners, camshafts, exhaust systems and ignition systems in conjunction with stock compression ratios
    • Unique style with Screamin’ Eagle logo
    • Sold in pairs
  • $ 6.92
    $ 6.92

    Original Equipment replacement spark plugs

    • Each sold separately
  • $ 8.32
    $ 8.32

    A special thread and shell coating ensures quick and easy removal from aluminum heads and resists corrosion.

    • Gold palladium insert extends life and improves resistance to corrosion
    • Tapered tip provides better spark exposure to air/fuel mixture and allows the mixture to flow more easily through gap area for maximum combustibility
    • Fouling resistance is improved with smaller diameter center electrode wire and insulator tip
    • Copper-cored ground electrode runs cooler for extended life
    • Anti-seize coating on threads
    • Anti-seize coating on threads
  • $ 24.04
    $ 24.04

    Screamin' Eagle® ST Spark Plugs feature double platinum coating for superior erosion resistance and extended life. The "V" trimmed ground electrode reduces shrouding of the flame front to promote flame propagation, and the fine wire center electrode enhances start ups and ignitability.

    • Feature Ribbed Core Technology (RCT) that provides resistance to fouling, and are designed with Original Equipment-style noise suppression to prevent electrical interference with radios and CB communication equipment
    • Works great in racing applications where rich air/fuel conditions are required
    • Designed for high performance applications involving modifications in high flow air cleaners, cam shafts, exhaust, performance heads, ignition components, higher compression ratios above O.E configurations or engines specific for racing applications
  • $ 24.04
    $ 24.04

    Screamin' Eagle® ST Spark Plugs feature double platinum coating for superior erosion resistance and extended life. The "V" trimmed ground electrode reduces shrouding of the flame front to promote flame propagation, and the fine wire center electrode enhances start ups and ignitability.

    • Feature Ribbed Core Technology (RCT) that provides resistance to fouling, and are designed with Original Equipment-style noise suppression to prevent electrical interference with radios and CB communication equipment
    • Works great in racing applications where rich air/fuel conditions are required
    • Designed for high performance applications involving modifications in high flow air cleaners, cam shafts, exhaust, performance heads, ignition components, higher compression ratios above O.E configurations or engines specific for racing applications
    • Sold in pairs
  • $ 24.04
    $ 24.04

    Screamin' Eagle® ST Spark Plugs feature double platinum coating for superior erosion resistance and extended life. The "V" trimmed ground electrode reduces shrouding of the flame front to promote flame propagation, and the fine wire center electrode enhances start ups and ignitability.

    • Feature Ribbed Core Technology (RCT) that provides resistance to fouling, and are designed with Original Equipment-style noise suppression to prevent electrical interference with radios and CB communication equipment
    • Works great in racing applications where rich air/fuel conditions are required
    • Designed for high performance applications involving modifications in high flow air cleaners, cam shafts, exhaust, performance heads, ignition components, higher compression ratios above O.E configurations or engines specific for racing applications
    • Sold in pairs
  • $ 6.92
    $ 6.92

    Original Equipment replacement spark plugs

    • Each sold separately
  • $ 5.52
    $ 5.52

    Original Equipment replacement spark plugs

    • Each sold separately
  • $ 6.92
    $ 6.92

    Original Equipment replacement spark plugs

    • Each sold separately
  • $ 6.92
    $ 6.92

    Original Equipment replacement spark plugs

    • Each sold separately
  • $ 5.52
    $ 5.52

    Original Equipment replacement spark plugs

    • Each sold separately
  • $ 8.37
    $ 8.37

    A special thread and shell coating ensures quick and easy removal from aluminum heads and resists corrosion.

    • Gold palladium insert extends life and improves resistance to corrosion
    • Tapered tip provides better spark exposure to air/fuel mixture and allows the mixture to flow more easily through gap area for maximum combustibility
    • Fouling resistance is improved with smaller diameter center electrode wire and insulator tip
    • Copper-cored ground electrode runs cooler for extended life
    • Anti-seize coating on threads
    • Anti-seize coating on threads
  • $ 9.72
    $ 9.72

    A special thread and shell coating ensures quick and easy removal from aluminum heads and resists corrosion.

    • Gold palladium insert extends life and improves resistance to corrosion
    • Tapered tip provides better spark exposure to air/fuel mixture and allows the mixture to flow more easily through gap area for maximum combustibility
    • Fouling resistance is improved with smaller diameter center electrode wire and insulator tip
    • Copper-cored ground electrode runs cooler for extended life
    • Anti-seize coating on threads
    • Anti-seize coating on threads
1 - 16 of 16

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