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MMD Powerline M43TBOLT Comprehensive kit includes the items needed to tune-up a Mercruiser 4.3 liter engines with a Thunderbolt ignition system. Normal annual maintenance items, including distributor cap, rotor, spark plugs, spark plug wires, oil filter, fuel filter, and fuel treatment For Mercruiser 4.3 liter 262 cu. in. GM models using Thunderbolt ignition and NGK BR6FS spark plugs Packaged conv…