Have you provided your feedback to TF? Nothing will change if they aren't aware of concerns. I would venture a guess that there wasn't an expectation for folks to take an expensive CNC head that flows 300 already and start cutting on it. Or more likely, they never considered the potential of a larger valve being installed. As mentioned, this was supposed to be the street head and a race version coming later? I can understand the frustration on the valve seats, but the condemnation seems a bit quick on the draw. These heads are still going to serve the large majority of people looking for a performance street or "race" head.
