A prototype part I contracted out. So far it looks like it will work nicely.
I designed them to accept aftermarket o-ring fuel injector bungs. This way I can use the common 14 mm Bosch-style injectors, or the newer 15 mm GM LS-style injectors. I can also install the bungs at various depths to vary injector height from the intake runners.
These of course require a custom fuel rail designed to work with o-ring injectors too. I’ll have to supply that part as well.
Don’t ask me about price and availability at this time, as I don’t know yet.
Hopefully you won't have to machine it flat again after the bungs are welded. You could bring the mating surface in pretty easily on a real flat plate with some stickum 180 grit. That looks like a nice part.