I have a set of 500 EFI heads off my 2000 mercury motor with 333 hoours on it. Replaced them when I bought boat last year as I didn't want to wait for them to be rebuilt, needs all new valves intake and exhaust with springs etc. This is just the bare heads. Make me an offer and remember I do know how much they are worth rebuilt with new parts as I just bought two last september. Don't think as heavy as they are it is practical to ship them so prefer not to ship. I live in 48843, Howell, MI
Walter
517-294-3179