Presenting the E3.34 by E3 Spark Plugs, a 14mm, 0.750” reach plug featuring a gasket seat – meticulously designed for an array of powersport applications, with a special emphasis on older Harley Davidson motorcycles. Engineered to meet the distinctive demands of these applications, the E3.34 stands as a testament to our commitment to precision and performance.

This spark plug features the patented DiamondFIRE ground electrode, securely fastened to the shell with two legs. This innovative design not only facilitates efficient heat transfer but also ensures durability against the intense vibrations associated with powersport engine applications. The E3.34 is your reliable choice for enduring performance, especially tailored for older Harley Davidson motorcycles.

The unique DiamondFIRE side wire, proven to enhance power, reduce fuel consumption, and improve hydrocarbon emissions over extended use, further solidifies the E3.34 as the spark plug of choice for powersport enthusiasts. The E3 ground electrode and full-size center electrode contribute to optimal performance throughout an extended product life.

Simplify your spark plug replacement process – the E3.34 effortlessly replaces a variety of competitors, including:

CHAMPION: RN9YC, RN11YC, RN12YC

NGK: BPR5ES, BPR6ES, BPR7ES, BR5ES

Choose E3 Spark Plugs for an unparalleled blend of precision engineering and enduring performance. Elevate your powersport experience with the E3.34 – where innovation meets reliability for sustained excellence in older Harley Davidson motorcycles and beyond.