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Best Electrode Spark Plug

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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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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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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RC12YC Spark Plug for Champion RC12YC Compatible with Briggs & Stratton 491055 491055S 491055T 72347GS 72347 805015 M78543 for Kohler 12 132 02, 12 132 02-S, 25 132 12-S (Pack of 10)

  • RC12YC SPARK PLUG REPLACE for champion rc12yc 2829 71-1711, for John Deere M78543.
  • Replace for Briggs and Stratton 491055, 491055S, 491055T, 499608, 5066, 72347GS, 792015, 805015, 692051, 694385.
  • FIT FOR KOHLER 12 132 02, 12 132 02-S, 12 132 01-S, 25 132 12-A, 25 132 12-S, 24 132 01-S.
  • REPLACE FOR ARIENS 21525900, 08811700, 21536800, 21534100, 21531100, 21537800.
  • for Gravely 21531100, 21534100, 21536800.
  • FUNCTION OF RC12YC SPARK PLUG -- The spark plug adopts copper core electrode. The copper core central electrode can accurately control the thermal range of the spark plug, optimize the performance of the spark plug and prolong the service life of the spark plug. Spark plugs offer reliable performance and durability, superior corrosion resistance and longer service life. Please rest assured to buy!.
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E3 Spark Plugs E3.54 Automotive Spark Plug, Pack of 1

  • FOR OPTIMAL PERFORMANCE: Automotive spark plug that fits a variety of domestic applications, designed to increase power, reduce fuel consumption, and improve hydrocarbon emissions.
  • PATENTED TECHNOLOGY: DiamondFIRE ground electrode is secured to the shell with 3 legs that help facilitate excellent heat transfer and increase turbulence in the cylinder.
  • INCREASED DURABILITY: Designed with colder heat ranges to enable performance modifications, and contains Yttrium-enhanced alloy for up to 8% reduction in side wire temperature for less pre-ignition.
  • WHAT'S INCLUDED: One (1) E3.62 spark plug. Features 14mm thread diameter.
  • 0.708-inch thread reach plug with taper seat.
  • WARRANTY: Often used for domestics. Unique ground electrode and full-size center electrode provides optimal performance guaranteed for five years or 100,000 miles.
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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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E3 Spark Plugs E3.68 Automotive Spark Plug, Pack of 1

  • FOR OPTIMAL PERFORMANCE: Automotive spark plug that fits a variety of import and domestic applications, designed to increase power, reduce fuel consumption, and improve hydrocarbon emissions.
  • PATENTED TECHNOLOGY: DiamondFIRE ground electrode is secured to the shell with 3 legs that help facilitate excellent heat transfer and increase turbulence in the cylinder.
  • INCREASED DURABILITY: Designed with colder heat ranges to enable performance modifications, and contains Yttrium-enhanced alloy for up to 8% reduction in side wire temperature for less pre-ignition.
  • WHAT'S INCLUDED: One (1) E3.68 spark plug. Features 14mm thread diameter.
  • 1-inch thread reach plug with gasket seat.
  • WARRANTY: Often used for Hemi. Unique ground electrode and full-size center electrode provides optimal performance guaranteed for five years or 100,000 miles.
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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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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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