Accel Copper Core Spark Plugs

Since the mid 1980's, ACCEL"s U-Groove Spark plugs have set the standard for High Performance Spark Plugs. ACCEL Engineers developed and patented the U-Groove technology which permitted the spark to develop a much larger, hotter and fuller flash front. That effectively gave a more complete burn of the air/fuel mixture in the combustion chamber. Over the past 25 years engine head design and fuel management technology has changed. As a result, ACCEL is moving away from the U-Groove construction to the familiar "conventional" style ground electrode. In addition, the upper insulator will now be white instead of yellow, and available in convenient 4-packs.
Bottom line... This one-piece construction spark plug with conventional ground electrode provides exceptional performance and value by producing: