Sierra premium marine wire set 18-8803-2. Replaces Mercruiser 84-81676109, 84-816761A10, OMC 503752. Fits Ford 5.0, 5.8, 370 Cobra 7.4, 8.2 with conventional ignition. I picked these up from a mechanic that went out of business. Represented to me as in good working condition but I do always accept returns for any reason.