Wire Set Street Fire, GM Truck, 4.8L, 5.3L, 6.0L, '98-'05 Stock Replacement Wires For GM Truck Engines MSD IgnitionThe Street Fire Spark Plug Wires feature a low resistance conductor that's wrapped in a sleek and durable black sleeve. The terminals are covered in black boots that protect the conductor from engine heat to ensure spark delivery. Details: Boot Material: Silicone Core: Copper Emission Code: 5 Spark Plug Boot Angle: 45 Wire Diameter: 8. 0 Wire Series: Street Fire Application: GM LS Engines