Moroso 9862M Mag-Tune Plug Wire Set (SBC 90 Degree HEI), 1 Pack Fully tested to ensure secure termination, electrical conductivity, and dielectric strength Feature Moisture-Resistant 100 percent silicone boots and snap-lock spark plug terminals Start with a conductive latex-coated, heavy-duty fiberglass core and then add a spiral-wound Stainless nickel alloy conductor over the top