There are so many of these Speedmaster posts going this has already been answered but I’ll do it again. Anyone with a die grinder can carve on a set of heads. The can turn out piss poor, ok, or excellent. A cnc program can be made from any of the above so you never know how good it is till you at least at a minimum see flow sheets from it. The numbers should be on par with a TrickFlow Head but I’m betting it’s not close to the numbers they put out and both are a 190 cc intake runner.
