ACCEL 8mm Super Stock Graphite Custom Wire Sets are uniquely engineered to upgrade tired OEM spark plug wire sets with high spark energy that brings street-driven vehicles back to life. Custom-fit for big-block 454s, the 8mm wires have 450-degree-rated silicone jackets in classic ACCEL yellow extruded over rugged, tightly woven fiberglass braids. These spiral-core wire sets feature graphite suppression that eliminates RFI, high-dielectric-strength inner insulation, zinc-plated terminals, male/HEI-style distributor boots, and straight plug boots.