Harley Spark Plug
Harley Bike Spark Plugs at JJ Motorsports
Keep your Harley running strong with premium spark plugs from JJ Motorsports, featuring standard and iridium designs for reliable ignition and maximum performance on Sportster XL, Twin Cam, Evo, and Big Twin engines. These high-quality plugs deliver hotter sparks and longer life for everyday riding or performance builds.
Shop Drag Specialties spark plugs for proven reliability. Explore related categories such as Harley lights and electrical for coils and wires, or Harley for exhaust and tuning to complete your ignition system.
Top Harley Spark Plugs
- Drag Specialties Spark Plugs 79-85 XL E18-6661SDS – Standard plugs for 1979-1985 XL Sportster; classic heat range for Ironhead engines.
- Drag Specialties Iridium Spark Plugs TC/XL E18-6655IDS – Iridium plugs for Twin Cam and Sportster; extended life and hotter spark.
- Drag Specialties Spark Plugs 99-17 TC/XL E18-6655SDS – Standard plugs for 1999-2017 Twin Cam and XL; OEM-style performance.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
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DRAG SPECIALTIES Spark Plugs - '75-'99 BT (MID) E18-6662SDS
DRAG SPECIALTIES
$15.85DRAG SPECIALTIES spark plugs deliver the reliable ignition performance your classic big-twin demands, with engineering designed specifically for '75-'99 Harley-Davidson models. The 95% pure alumina insulator resists heat shock and eliminates flashover,...21030199- SKU:
- 21030199
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- CENTER ELECTRODE TYPE:
- STANDARD
- ELECTRODE TIP MATERIAL:
- NICKEL ALLOY
- TYPE:
- RESISTOR
- UNITS:
- PAIR
- CENTER ELECTRODE PROJECTION:
- PROJECTED
- RIDING STYLE:
- STREET
- STYLE:
- COPPER
- THREAD REACH METRIC:
- 19.1 MM
- GROUND ELECTRODE CONFIGURATION:
- SINGLE
- HEX SIZE METRIC:
- 16 MM
- MODEL:
- BPR5ES-11
- PRODUCT NAME:
- SPARK PLUG
- GROUND ELECTRODE SHAPE:
- STANDARD
- HEAT RANGE:
- 5
- TERMINAL CONFIGURATION:
- REMOVABLE NUT
- THREAD REACH:
- 19,1 MM (3/4')
$15.85 -
NGK SPARK PLUGS Spark Plug - BPR2ESSOLI 2015
NGK SPARK PLUGS
$6.95NGK's BPR2ESSOLI spark plugs deliver the thermal stability and durability serious racers and high-performance engines demand. The wide operating heat range prevents both fouling in cooler conditions and preignition when running hot—eliminating a common...21030463- SKU:
- 21030463
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- GROUND ELECTRODE SHAPE:
- STANDARD
- PRODUCT NAME:
- SPARK PLUG
- RIDING STYLE:
- STREET
- SPARK GAP:
- 0,8 MM (0,031')
- SPARK GAP IMPERIAL:
- 0.031'
- SPARK GAP METRIC:
- 0.8 MM
- STYLE:
- STANDARD
- CENTER ELECTRODE TYPE:
- STANDARD
- ELECTRICAL RESISTANCE:
- 5K OHMS
- ELECTRODE TIP MATERIAL:
- NICKEL ALLOY
- GROUND ELECTRODE CONFIGURATION:
- SINGLE
- THREAD REACH METRIC:
- 19.1 MM
- TYPE:
- RESISTOR
- HEAT RANGE:
- 2
- HEX SIZE METRIC:
- 20.6 MM
- MODEL:
- BPR2ES
- CENTER ELECTRODE PROJECTION:
- PROJECTED
- TERMINAL CONFIGURATION:
- SOLID TERMINAL
- UNITS:
- EACH
$6.95 -
DRAG SPECIALTIES Spark Plugs - '75-'99 BT (COLD E18-6663SDS
DRAG SPECIALTIES
$14.79Proper spark plugs are non-negotiable for reliable ignition and consistent performance on your Big Twin Harley. These DRAG Specialties plugs deliver dependable firing across the RPM range with superior heat resistance and corrosion protection—critical...21030203- SKU:
- 21030203
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- GROUND ELECTRODE SHAPE:
- STANDARD
- PRODUCT NAME:
- SPARK PLUG
- RIDING STYLE:
- STREET
- CENTER ELECTRODE TYPE:
- STANDARD
- ELECTRODE TIP MATERIAL:
- NICKEL ALLOY
- GROUND ELECTRODE CONFIGURATION:
- SINGLE
- THREAD REACH METRIC:
- 19.1 MM
- TYPE:
- RESISTOR
- HEAT RANGE:
- 7
- STYLE:
- COPPER
- TERMINAL CONFIGURATION:
- REMOVABLE NUT
- THREAD REACH:
- 19,1 MM (3/4')
- UNITS:
- PAIR
- CENTER ELECTRODE PROJECTION:
- PROJECTED
- HEX SIZE METRIC:
- 16 MM
- MODEL:
- BPR7ES-11
$14.79
