NGK Replacement Spark Plugs for Hemi Engines OEM Heat Range
797 Performance has done the research to make it easier for you to replace your plugs on your Hemi. These are a direct replacement plug. Other heat ranges are available for various applications including boost, or nitrous oxide . 5.7 Non -VVT uses a heat range 5 and a Taper Seal5.7 Eagle uses a heat range 5 and a Washer Seal6.1 uses a heat range 5 and a Taper Seal6.4 uses a heat range 6 and a Taper Seal6.2 SC uses a heat range 6 and a Washer Seal (stock boost only it's advised to use a heat range 7 on a modified 6.2)Manufacturer Spark Plug info - G-Power® NGK G-Power® platinum spark plugs feature a single platinum tip, 98% pure copper core and a .6 mm fine-wire center electrode for more focused sparks and better ignitability. Trapezoidal ground electrode reduces quenching High-grade alumina silicate ceramic for stronger insulation Cold-rolled threads prevent cross-threading and damage to cylinder heads Iridium IX® The improved throttle response, superior anti-fouling and high-ignitability makes Iridium IX® ideal for the performance enthusiast. Iridium’s extremely high melting point is perfectly suited to today’s high-temperature engines, delivering outstanding acceleration, fuel efficiency and durability. Fine iridium tip ensures high durability and a consistently stable spark Trivalent metal plating for superior anti-corrosion and anti-seizing properties Outstanding acceleration, high fuel efficiency and durability Laser Iridium® Laser Iridium is designed alongside OEMs to meet quality and durability standards for each manufacturer. Featuring high-grade alumina silicate ceramic and fine wire center electrodes, the Laser Series brings OE performance to every engine. Ruthenium HX™ High-Ignitability Spark Plugs Ruthenium HX™ brings the most advanced spark plug technology to the automotive aftermarket, delivering better efficiency and power for today’s engines. DFE & PSPE® tip designs Superior oxidation resistance Advanced high-ignitability technology Enhanced blistering/anti-peeling