ACCEL 5056B SuperStock 8mm 5000 Series Blue Custom Spiral Core Spark Plug Wire Set A true performance upgrade for tired old Original Equipment wires on 1984 to 1993 5.0 Mustangs and 1988 to 1998 Ford V8 truck engines Delivers maximum spark energy to the plugs and creates a longer lasting hotter flame kernel quicker throttle response and reduced emissions 550 degree rated double silicone construction eliminates arcing and resists heat petrochemicals and moisture All Kevlar stranded inner core and fiberglass braiding provide added pull strength and better terminal retention Comes with matching blue plug boots