ACCEL 8199 Spark Plug, 14mm Thread, .460 In, Tapered Seat, 5/8 Hex

ACCEL's patented race proven spark plugs in a Shorty configuration. The overall length has been reduced 3/16 in to 3/8 in (depending on the specific spark plug) to gain critical air gap between the spark plug boot and the exhaust manifold or header tube. This helps eliminate burning the spark plug boot or dimpling the header tube. The shorter spark plug length also can make it easier to install an remove the spark plugs in certain applications where there is not a lot of room to fit a socket or move a wrench around. These ACCEL Shorty Copper Spark Plugs have 14mm / .460 in