Sierra’s MAGFORCE Ignition Wires are “Electronics Friendly” protecting all of your electronic devices and electronic engine controls from RFI and EMI while delivering the maximum amount of voltage. Exact fit design ensures easy installation and years of trouble - free service. High-quality conductive center carrier reinforcement ensures conductor integrity. Mag/Wire wound core delivers maximum voltage without radio frequency interference (R.F.I.) & electro magnetic interference (E.M.I.). The 8mm high tear strength silicone jacket protects conductor up to 500°F. Posi-lock stainless steel terminals resist corrosion. Features high-temperature pre-greased silicone insulators.