Mercruiser 4cyl Premium Spark Plug Wire Set by SierraFor 4 cylinder 224CID Mercruiser engines with conventional ignition systems. Kit includes coil wire.; 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.; Replaces: Mercruiser; 84-813720A6, 84-816761Q6, 84-813720A; Mallory; 9-28014;