E3 Spark Plugs E3.52 Automotive Spark Plug for GM and Small Block Chevrolet Engines

The E3.52 auto spark plug is a 14 mm., 0.375” reach plug with a gasket seat, specifically designed to fit a wide variety of GM applications from the 1950s to the early 1980s, including older small block Chevrolet engines. E3 automotive plugs are built with three legs that secure the patented DiamondFIRE electrode to the shell, ensuring optimal heat transfer and increased turbulence within the cylinder for enhanced combustion. This increases power, reduces fuel consumption, and improves hydrocarbon emissions over long-term use. The DiamondFIRE open design enhances engine power, reduces gasoline consumption, decreases harmful emissions like hydrocarbons and carbon monoxide, and significantly extends the life of the spark plug.

Designed to fit a variety of GM applications from the 1950s to the early 1980s DiamondFire technology enhances combustion efficiency and engine performance Features a 14 mm., 0.375” reach with a gasket seat Increases power by up to 4%-12% and improves fuel economy by up to 3%-13% More complete burn helps to reduce emission and minimize carbon buildup This product is backed by a 5-year/100,000-mile limited warranty