8.2 Thunder Race Wires are wrapped with a Hi-Temp Silicone Impregnated Fiberglass Sleeving. It is designed and engineered for extreme racing where additional shock and voltage insulation is required. Each wire is terminated and features double locking spring terminals with 100% silicone boots. Shrink tubing bonded at each end completes the wire to boot sealing and each is earmarked with its respective cylinder number to ensure correct firing order in installation.