These E3 Replacement Spark Plugs feature DiamondFire technology for truly hassle-free performance. Providing better ignition, these plugs discharge properly and maintain a defect-free composition throughout the lifespan of your engine. Expect quicker starts, increased power output, fuel savings, resistance to fouling, and lower emissions. You'll gain up to 12% increased power over other brands in 2- and 4-stroke engines thanks to higher overall efficiency. These plugs will pay for themselves by using up to 13% less gas. The plugs also emit 58% less toxic emissions when compared to other spark plugs in the long run, making them an ecologically friendly option. These spark plugs are designed to replace the Champion J17LM, J19LM, and J8C, as well as NGK’s B4LM and B6S.