Brand: Ford Racing Performance Parts Product Line: Ford Racing Spark Plug Wire Sets Assembled: Yes Diameter (mm): 9.00mm RFI Suppression: Yes Wire Color: Blue Distributor Plug Ends: Male/HEI Spark Plug Boot Ends (degrees): 45 degrees Distributor Boot Color: Black Distributor Boot Material: Silicone Spark Plug Boot Color: Black Spark Plug Boot Material: Silicone Spark Plug Boot Ends: Eight 45 degree Coil Wire Included: Yes Quantity: Sold as a set. Spark Plug Wires, 9mm, Blue, Spiral Wound, 45 Degree Boots, Ford/Lincoln/Mercury, 5.0/5.8L, Set * Check to make sure this part fits your application Low resistance for minimum spark loss. These 9mm wires feature a spiral-wound suppression core for low resistance and minimum spark loss. They have tough silicone insulation to withstand high temperatures and voltage loss for minimum crossfire, and are highly resistant to fuels, oils, and solvents. Other features include 45 degree plug boots (most applications), stainless steel distributor cap terminals, and a coil wire (if applicable). The wires are numbered for each cylinder and have the "Ford Racing" script on them.