ACCEL Spark Plug - 14 mm Thread - 0.708 in R - Tapered Seat - Resistor - Set of 4 A-1 Racing Products 1965-1966 American Motors Classic

1965-1966 American Motors Classic

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ACCEL Spark Plug - 14 mm Thread - 0.708 in R - Tapered Seat - Resistor - Set of 4 A-1 Racing Products 1965-1966 American Motors ClassicACCEL 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