MSD Street Fire spark plug wire sets deliver high performance at a value price. The wires feature 500 ohms per foot of resistance for improved spark delivery and power, with a helically wound conductor that suppresses EMI. MSD also built Street Fire wires to last. Manufactured in the USA, Street Fire wires feature 8mm silicone and synthetic jackets to resist heat and abrasion, silicone boots to protect against high exhaust temperatures, and an Aramid core to provide great strength and durability. A crimping tool is included with universal sets