Our custom spark plug wires are made with a high quality 8mm silicone jacket and feature a spiral wound core for maximum electrical efficiency. Each wire set is custom designed for each application covering over 40 years of Volvo models. Engineered to meet and surpass OEM quality our wire sets include factory style metal end connectors (where applicable) that can withstand the heat of turbo charged models. Each wire set includes plug and coil wires as well as dielectric grease used on the plug boots for easy removal at tune-up time.