Sierra International 18-8802-1 Marine Spark Plug Wire Set, Conventional Ignition, 8 Cylinder, Mercury, Mercruiser, OMC, Volvo Penta Engines Kevlar core for maximum durability and long life Durable stainless steel wound conductor for maximum horsepower and engine performance Premium silicone jacketing and boots for the ultimate in high temperature protection Superior RFI suppression for the most sensitive electronic system Corrosion resistant stainless steel spark plug and distributor terminals for maximum conductivity