Introducing the E3.39 by E3 Spark Plugs, a 10mm, 0.750” reach plug featuring a gasket seat – meticulously engineered for a diverse range of powersport applications, with a focus on import motorcycles. The E3.39 is a preferred choice for high RPM engines, commonly found in Honda, Suzuki, Yamaha, and other performance-driven motorcycles.

This spark plug showcases the patented DiamondFIRE ground electrode, firmly secured to the shell with two legs. This innovative design not only enhances heat transfer efficiency but also ensures durability against the intense vibrations inherent in powersport engine applications. The E3.39 is the epitome of reliability, tailored for import motorcycles and high RPM engines, where precision performance is essential.

The unique DiamondFIRE side wire, celebrated for its ability to increase power, reduce fuel consumption, and improve hydrocarbon emissions over extended use, solidifies the E3.39 as the spark plug of choice for discerning riders of import motorcycles. The E3 ground electrode and full-size center electrode further contribute to optimal performance throughout an extended product life.

Choose E3 Spark Plugs for an unparalleled combination of precision engineering and enduring performance. Elevate your powersport experience with the E3.39 – where innovation meets reliability for sustained excellence in high RPM engines, particularly in Honda, Suzuki, Yamaha, and other import motorcycles.