AFR SBM Heads, Just got back from PRI

rumblefish360 said
As an owner of a set, yes, after you double check them just to be sure. Mine were good to go. Very nice work. There CNC program is conservative but good. Another 15, 15+ cfm of flow is possible.

My machinist put in better stem seals and polished the valve stems. They said they surfaced the head for better head gasket sealing.