Mercruiser Thunderbolt IV Ignition Module Part # 8F03A V8 22 5.7/V8 Alpha One (1st 4 photo's this item. Other photos for other listings.) 1986 1987 1988 1989 I'm not sure all the years Mercruiser had this exact option package as is on the label but the cover fits on any motor Also have the Outdrive Thunderbolt IV Ignition Module Outdrive trim piston assemblies Rams SS prop in like new condition Steering wheel Engine cover Stainless steel under floor fuel tank fresh water cooling assembly power trim motor assembly and other parts for this series motor combo. This popular package happened to be in a 23' Thompson but was in all the popular mtg'r boats, Sea Ray, Chris Craft, etc Please send a message if you have any questions. Please check our other listings including vintage automotive parts, manuals, literature, badges, etc.