ACCEL 8197 Spark Plug

14mm Thread - .375 in Reach - Gasket Seat - 8 Pack of 0437S;

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.;