Sierra 18-8814-1 Spark Plug Wire Set Premium Marine Wire Leads Magnetic Suppression Core Manufactured for your specific application. 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.; Ignition Type: EST ElectronicCyl.: 4Interchangeable with: Mallory; 9-28027; OMC Stern Drive; 503749;