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I would say that they deserve a trip to a machinist for a valve job, to increase flow, and to check for whatever else. My set had 2 valve spring seats under one of the springs.


So what does a machine shop charge to inspect a brand new set of heads? My local shop charges $500 to rebuild a set of factory heads.(new guides, grind valves/seats and surface head) If a shop is going to charge that, your $1000 set of heads turns into a $1500 set.