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Best Spark Electrode

Denso (4702) IK20TT Iridium TT Spark Plug, (Pack of 1)

  • Larger spark translates to more power and superior fuel economy.
  • 0.4 mm iridium center electrode, world’s smallest diameter that maximizes firing potential.
  • 0.7 mm needle tip ground electrode, promotes higher spark energy and less heat quenching.
  • DENSO patented 360 degree laser welding process, ensuring exceptional quality bond and structural strength with the iridium center electrode..
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ACDelco 41-993 Professional Iridium Spark Plug (Pack of 4)

  • Iridium offers better engine idle stability and smoother performance.
  • Iridium allows for smaller, more efficient electrode designs for improved cold starting and quicker acceleration.
  • Iridium fine-wire electrode helps improve ignition of the fuel and burns away carbon deposits on the tip of the plug as they form, to help improve fuel economy.
  • One piece suppressor seal blocks radio frequencies that can affect vehicle electronics.
  • Suppressor seal meters spark energy for longer electrode life and seals against combustion leakage. Before installing new spark plugs, use a gap guide to make sure your new spark plugs have the correct gap.
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Autolite Small Engine Spark Plug (3924)

  • MAXIMUM PERFORMANCE: Every Copper Spark Plug has a full copper core electrode which provides higher thermal conductivity for better performance in all conditions.
  • IMPROVED DURABILITY: All Autolite spark plugs are Leak proof and come with a heat fused internal seal for long lasting durability.
  • CONSTRUCTION: These replacement spark plugs have a copper-glass seal which bonds the insulator and the terminal post center electrode together.
  • FUEL EFFICIENCY: The Autolite copper automotive replacement spark plug are guaranteed to deliver quick starts, better fuel economy and smooth acceleration.
  • AUTOLITE ADVANTAGE: Since 1936, Autolite has been a trusted leader and innovator in spark plug technology. You can count on our copper plugs for performance and value, backed by decades of experience and passion.
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E3 Spark Plugs E3.38 Premium Powersports Spark Plug w/ DiamondFIRE Technology (Pack of 1)

  • High performance engine spark plug for a variety of powersport applications, specifically designed to increase power, reduce fuel consumption, and improve hydrocarbon emissions.
  • E3's patented DiamondFIRE edge-to-edge electrode provides maximum performance with increased efficiency, and a faster more complete burn.
  • Proprietary electrode design presents multiple sharp edges to the center electrode providing maximum performance for longer life of this premium spark plug.
  • Includes one (1) E3.38 spark plug with a limited lifetime warranty.
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E3 Spark Plugs E3.33 Premium Powersports Spark Plug w/ DiamondFIRE Technology (Pack of 1)

  • High performance engine spark plug for a variety of powersport applications, specifically designed to increase power, reduce fuel consumption, and improve hydrocarbon emissions.
  • E3's patented DiamondFIRE edge-to-edge electrode provides maximum performance with increased efficiency, and a faster more complete burn.
  • Proprietary electrode design presents multiple sharp edges to the center electrode providing maximum performance for longer life of this premium spark plug.
  • Includes one (1) E3.33 spark plug with a limited lifetime warranty.
  • Crosses with Champion RC9YC, RC12YC, RC14YC.
  • and NGK BKR5E11, BKR5ES, BKR6E11, BKR6ES, IFR5L11.
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Autolite 3924 Copper Resistor Automotive Replacement Spark Plugs (4 Pack)

  • MAXIMUM PERFORMANCE: Every Copper Spark Plug has a full copper core electrode which provides higher thermal conductivity for better performance in all conditions.
  • IMPROVED DURABILITY: All Autolite spark plugs are Leak proof and come with a heat fused internal seal for long lasting durability.
  • CONSTRUCTION: These replacement spark plugs have a copper-glass seal which bonds the insulator and the terminal post center electrode together.
  • FUEL EFFICIENCY: The Autolite copper automotive replacement spark plug are guaranteed to deliver quick starts, better fuel economy and smooth acceleration.
  • AUTOLITE ADVANTAGE: Since 1936, Autolite has been a trusted leader and innovator in spark plug technology. You can count on our copper plugs for performance and value, backed by decades of experience and passion.
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Autolite 3924 Copper Resistor Automotive Replacement Spark Plug (1 Pack)

  • MAXIMUM PERFORMANCE: Every Copper Spark Plug has a full copper core electrode which provides higher thermal conductivity for better performance in all conditions.
  • IMPROVED DURABILITY: All Autolite spark plugs are Leak proof and come with a heat fused internal seal for long lasting durability.
  • CONSTRUCTION: These replacement spark plugs have a copper-glass seal which bonds the insulator and the terminal post center electrode together.
  • FUEL EFFICIENCY: The Autolite copper automotive replacement spark plug are guaranteed to deliver quick starts, better fuel economy and smooth acceleration.
  • AUTOLITE ADVANTAGE: Since 1936, Autolite has been a trusted leader and innovator in spark plug technology. You can count on our copper plugs for performance and value, backed by decades of experience and passion.
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Autolite 24 Copper Resistor Automotive Replacement Spark Plugs (4 Pack)

  • MAXIMUM PERFORMANCE: Every Copper Spark Plug has a full copper core electrode which provides higher thermal conductivity for better performance in all conditions.
  • IMPROVED DURABILITY: All Autolite spark plugs are Leak proof and come with a heat fused internal seal for long lasting durability.
  • CONSTRUCTION: These replacement spark plugs have a copper-glass seal which bonds the insulator and the terminal post center electrode together.
  • FUEL EFFICIENCY: The Autolite copper automotive replacement spark plug are guaranteed to deliver quick starts, better fuel economy and smooth acceleration.
  • AUTOLITE ADVANTAGE: Since 1936, Autolite has been a trusted leader and innovator in spark plug technology. You can count on our copper plugs for performance and value, backed by decades of experience and passion.
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Quicksilver 816737Q NGK BP8HN-10 V-Power Spark Plug, 1-Pack

  • NGK BP8HN-10V-Power Spark Plugs feature a “V” cut in the center electrode that helps direct ignition spark to the edge of the electrode to aid spark development and increase ignitability.
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Harley Sportster Roadster XL 1200R Iridium Performance Spark Plugs Pair repl. OEM# 6R12

  • The ultimate in spark plug technology and performance.
  • Iridium electrode is smaller than a standard electrode.
  • Hotter spark and extended spark plug service life compared to conventional plugs.
  • Has the distinctive black ceramic with and gold-colored corrosion-protected coating on the metal shell.
  • Sold in pairs and replaces Harley# 6R12 / NGK# DCPR7EIX.
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-NEW- NGK 5464 BKR5EIX-11 Iridium IX Spark Plug (Pack of 6)

  • According to the material and type of spark plug, the recommended mileage is different..
  • Before the operation of the engine is abnormal, it is recommended that you regularly detect and replace spark plugs..
  • The quick reaction brings you new feeling..
  • The spark plug is the key to unlock the engine. Multistage electrode Multi electrode design further improves ignition performance and idling stability..
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Iridium Performance Spark Plugs Pair for Harley Softail Slim Twin Cam repl. Harley# 6R12

  • The ultimate in spark plug technology and performance.
  • Iridium electrode is smaller than a standard electrode.
  • Hotter spark and extended spark plug service life compared to conventional plugs.
  • Has the distinctive black ceramic with and gold-colored corrosion-protected coating on the metal shell.
  • Sold in pairs and replaces Harley# 6R12 / NGK# DCPR7EIX.
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Bosch Automotive (F6DTC) Copper with Nickel Spark Plug - Single

  • 50 percent longer life than traditional copper core spark plugs.
  • Exclusive Yttrium extruded copper core center electrode increases resistance to spark erosion.
  • Tapered, v-profile nickel chromium ground electrode for consistent performance and prolonged service life.
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