Speedmaster Aluminum Heads

I was at the engine shop today and the owner showed me a set of Chinese knock off heads that just came in on a fairly new build. The owner went with all cheap Chinese parts in the engine and it was trash after a few thousand miles. The valves were mushroomed on both ends and the valve guides were loose. The guy saved a few hundred bucks first time around and now he has to do another rebuild and buy new parts. Chinese parts are junk. Buyer beware.