"All E3 Spark Plugs feature DiamondFire Technology - truly the last spark plug you'll ever need to buy! This E3 Spark Plug is warranted to provide better performance, to properly discharge a spark and to be free of defects in materials and workmanship for the life of your engine. Quicker starts, more power, saves gas, anti-foul design, and lower emissions. Energy - Increased power up to 12% over other brands in 2 & 4 stroke engines. Efficiency - Pays for itself by using up to 13% less ags versus other spark plug brands. Ecology - Reduces toxic emissions up to 58% in long-term use, versus other plugs. *All tests performed per EPA protocol 40 CRF 90 by independent labratories. For more info, please consult the EPA website. Your results may vary. Replaces: Champion - J17LM, J19LM, J8C, RJ17LM, RJ19LM, RV8C, 5861. NGK - B4LM, B6S, BR4LM, BR6S."