Quicksilver 816608Q83 Red Spark Plug Wire Kit for GM V8 MerCruiser Engines (19992001)Spark plug wire kit for GM-based MerCruiser V8 marine engines (305, 350, 377 CID) with Mercury ignition systems (19992001). Includes a complete set of 8 red wires with spark plug-end boots, cut to proper length for accurate plug placement in marine applications. Refer to your service manual for installation details.Features Fits GM V8 305, 350, 377 CID MerCruiser engines (19992001); Designed for use with Mercury ignition systems; Complete set of 8 red spark plug wires; Pre-cut lengths for precise fit to each plug location;