Wiring, Plug Set, GM 5.7L V-8 MERC SKI and others: Spark Plug Wire Sets;5.7L V-8 MERC SKI Conventional Mag Force Spark Plug Wire Set Premium Marine Wire Leads Magnetic Suppression Kevlar Durable stainless steel wound conductor for maximun life, horsepower and engine performance Superior RFI suppression for the most sensitive electronic systemsCorrosion resistant stainless steel spark plug and distributor terminals for maximum conductivity OEM style boots provide a sealed barrier against heat, dirt and moisture replaces: OMC 503752 replaces: OMC 503755 replaces: Mercury Marine 84-813720A12