Tune up kit for Mercruiser 5.0, 5.7, 7.4, 8.2 V8 engines with Thunderbolt Ignition. Includes spark plug wires, distributor cap/rotor, and 8 MR43LTS spark plugs for 1997 and newer engines. Item Description About this item Tune up kit for Mercruiser 5.0, 5.7, 7.4, 8.2 engines with Thunderbolt ignitions. The spark plugs are for Vortec engines 1997 and newer. Kit includes spark plug wires, coil wire, distributor cap/rotor, and 8 MR43LTS spark plugs Spark plug wires replace part numbers 84-816608Q61, 84816761K17, 84-816761Q17 Distributor cap/rotor kit replaces part number 805759Q3, 805759T3, 805759T1, 13524T1, 27-805760, 805759Q-3, 805759A5, 805759A 2, 16457A 4, 13524T 1, 13524A 5, 13524A 1 Eight AC Delco MR43LTS spark plugs. Check your engine cover to ensure these are the correct spark plugs for your engine before ordering. ? See more product details Payment We accept payment only through the Payment system. Shipping Most products are usually shipped within 1-2 business days from the date of being ordered. We do ship worldwide via the International Shipping Program. For an international shipment quote, please add add item to cart and attempt checkout. will supply the international shipping price. Return We do not accept returns except in certain, unlikely circumstances.