Fits : HEI systems and Merc V-6 and V-8 with Thunderbolt IV and V Ignition

Replaces:  Mercruiser 392-805570A2 392-7803A4, and Crusader 37068

Interchanges with Sierra Part Number: 18-5438

Meets or exceeds original equipment specs

Shipped Priority Mail, 2-3 day delivery in all 50 states!