Ford Racing Performace Parts - 1999-2004 Mustang - 9MM Spark plug wire set (Red) 4.6L 4V Mustang Red 45° Long Boot Wire-wound custom ignition wire sets feature low resistance for minimum spark loss. Silicone insulation and boots withstand high temperatures and voltage loss for minimum cross-fire and are highly resistant to fuels, oils and solvents. Long-life, tough stainless steel terminals for “post” type distributor caps. Includes coil wire for socket-type coil and “Ford Racing” identification. Cylinder number appears on each wire.