E3 Spark Plugs E3.40 Premium Automotive Spark Plug with DiamondFIRE Technology, 14mm Thread, 0.460” Reach, Taper Seat, Resistor, Pack of 1

FOR DOMESTIC APPLICATIONS: Designed to fit a wide range of domestic vehicles, this spark plug enhances power, improves fuel economy, and reduces harmful hydrocarbon emissions, making it ideal for various engine types and models. DIAMONDFIRE TECHNOLOGY: Patented side-wire electrode delivers a faster, more complete burn, boosting engine efficiency, with up to 4%-12% more power and 3%-13% better fuel economy depending on engine class. LOWER EMISSIONS: The more complete burn helps to reduce emissions, minimize carbon buildup, promote cleaner combustion, and support compliance with modern environmental and emissions standards. PERFORMANCE BUILT: Yttrium-enhanced alloy and colder heat range help prevent pre-ignition and support performance mods by reducing side-wire temperatures and improving combustion. LONG-LASTING PERFORMANCE: Includes a 5-year/100,000-mile limited warranty for long-lasting use and dependable performance without frequent replacements