E3 Spark Plugs E3.40 Premium Automotive Spark Plug with DiamondFIRE Technology, Pack of 1 Spark Plug

The E3.40 auto spark plug is designed for domestic applications from the 1960s to the early 1990s, featuring a 14 mm. thread diameter and a 0.460” reach with a taper seat. E3’s patented DiamondFIRE technology secures the electrode to the shell with three legs, resulting in improved engine efficiency, smoother acceleration, and faster starts. The unique DiamondFIRE side wire has been proven to boost power, reduce fuel consumption, and lower hydrocarbon emissions, while the full-size center electrode ensures optimal performance. The fixed gap design creates an edge-to-edge spark path, replenishing the spark zone with a fresh fuel/air charge. As a result, the spark plug delivers increased power output, better fuel efficiency, reduced carbon monoxide/hydrocarbon emissions, and a longer lifespan.

• Designed especially for cars from the 60s to early 90s
• DiamondFire technology enhances combustion efficiency and engine performance
• Delivers up to 12% more power and up to 13% better fuel economy in small engines
• Features a 14 mm. thread diameter and 0.460” reach with a taper seat
• Fixed gap design creates an edge-to-edge spark path
• More complete burn helps to reduce emission and minimize carbon buildup
• This product is backed by a 5-year/100,000-mile limited warranty
• E3 Spark Plug (Automotive)
• New