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Spark Plug Wire Set 1987-1990 Jeep 8mm Silicone 500 ohm/ft Street Thunder 51048 header-back-exhaust 4 V8 1970 - 1973Overview: STREETHUNDER CUSTOM 6 CYL BLACK Custom Spark Plug Wire Sets are duplicate of your OE wire set. Each wire is cut to length and booted to match your original wires. 8. 0mm StreeThunder wires feature a 500 ohm per foot resistance conductor wrapped in durable silicone blend double layer jacketing for heat protection, strength, and longevity. 8. 0mm StreeThunder wires are designed to deliver superior performance at an affordable price. Features: