These are outboard mounts made by Victor Gorecki.
I bought two of these for a twin boat, but canned the idea for several reasons.
This is direct from Gorecki:
"I designed Jackplate with Surfcam Cad/Cam system and a Haas VF2 CNC machining center. It is machined from billet, no angle or channel...
I am thinking that, for the best peace of mind and tunability, I am going to need to buy two brand new engines. I do not have experience with outboards and am not a nitro veteran, so figuring out to new engines and making them run in harmony logically seems easier and less headache.
I am...