My first post, I am building a new motor (383 Stroker)for my friends jet boat and he has these headers That I’m reusing on the new motor that I’ve never seen. Now they are polished and I’m prepping motor for dyno I got to thinking I wonder if someone makes this same exhaust for my big block. It looks like it’s going to flow awesome plus they look amazing. Does anyone know who makes these? I’m running Inmar water jacketed headers now and they don’t look cool at all.