Thunderbolt V6 Tri-Pak Tune-Up Kit | United Marine 1-111 United Marine Thunderbolt V6 Tri-Pak Tune-Up Kit | 1-111 Premium marine tune up kit includes distributor cap, rotor, and spark plug wires for Mercruiser V6 engines with Thunderbolt distributors. Kit fits Mercruiser 4.3L V6 262 cubic inch engines with Thunderbolt ignition systems Includes MEGA-MAG 8mm SSC silicone spark plug wire set, heavy-duty distributor cap and rotor with brass contacts, dielectric silicone grease, and wire separators Ignition coil wire included Wire set has 90 degree boots on each end