E3 Spark Plugs E3.54 is a unique spark plug featuring E3’s patented DiamondFIRE ground electrode. This spark plug promises optimal engine performance and is designed for improved power, fuel efficiency, and reduced emissions.

Key Features

  • Patented DiamondFIRE ground electrode
  • Increased fuel efficiency
  • Reduced emissions

Features and Specs for Each Model

  • Thread size: 14mm
  • Hex size: 5/8″ (16mm)


  • Improves engine power
  • Eco-friendly with reduced emissions
  • Increases fuel efficiency


  • It may not be compatible with all engines

Amazon Customer Review

★★★★ “The performance improvement was instant. Definitely a good buy!” – Steve M.


The E3 Spark Plugs E3.54 is an innovative product designed for modern-day engine needs. If you’re environmentally conscious and looking for improved engine performance, this spark plug is worth the investment.