Accels patented race proven U-Groove spark plugs are now available in a shorty configuration.The overall length of each plug has been reduced 1/4 in to 3/8 in (depending on the specific spark plug) to gain critical air gap space 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. 14mm Thread .750 in Reach - Gasket (flat) Seat.The shorter spark plug length also can make it easier to install and remove the spark plugs in certain appli cations where there is not a lot of room to work with a socket or wrench.{specs}Applications:1986-87 350ci (8) with aluminum heads
