E3 Spark Plugs E3.72 Premium Automotive Spark Plug with DiamondFIRE for Ford Applications

The E3.72 auto spark plug is a high-performance 18 mm., 0.430” reach spark plug designed with a taper seat, primarily for Ford applications from the 1950s to 1990s. E3’s patented DiamondFIRE technology utilizes three legs to secure the DiamondFIRE electrode to the shell, ensuring superior heat transfer and promoting increased turbulence within the cylinder for better combustion. It's proven to increase power, improve fuel efficiency, and reduce hydrocarbon emissions during long-term use. The full-size center electrode and specially designed ground electrode provide optimal performance. With a fixed gap that cannot be adjusted, the spark plug creates an edge-to-edge spark path through its DiamondFIRE open design, leading to increased engine power, improved fuel economy, and reduced carbon monoxide and hydrocarbon emissions.

Designed primarily for Ford applications from the 1950s to the 1990s DiamondFire technology enhances combustion efficiency and engine performance Produces up to 4% to 12% more power and up to 3% to 13% better fuel economy Features a 18 mm., 0.430” reach spark plug with a taper seat More complete burn helps to reduce emission and minimize carbon buildup Yttrium-enhanced alloy and colder heat range help prevent pre-ignition This product is backed by a 5-year/100,000-mile limited warranty