All I know is that when I bought the Cometics it was either stated with the gaskets or I read the technical sheet somewhere that you had to have a certain finish otherwise you could have possible leaks. My blueprint short block had a rougher finish, which I’m sure was normal and perfectly fine for the composite gaskets.I sent the Cometics back and just put regular felpros as I didn’t want to find out the hard way whether they worked or not. I’ve used mls on a multi cylinder Sport bike as well as some dirt bikes and I know both Head and cylinder
surfaces were smooth versus what was on my short block. YMMV
