HP Copper Spark Plug - Shorty - 0414S-4 gauges-clusters-and-clocks If your 1986 Mustang (V8)

If your 1986 Mustang (V8) HAS Subframe Connectors then you need Part Number ZGL8602SS

1 L6 1978 - 1980 Chevrolet C10 292/4

00-inch diameter x 8

9 V8 1961 - 1971 Ford Ranch Wagon 390/6

2008 Harley-Davidson Road King Screamin Eagle FLHRSE4

HP Copper Spark Plug - Shorty - 0414S-4 gauges-clusters-and-clocks If your 1986 Mustang (V8)Overview: 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