Actually they are chinese made for Pro Comp who is based in Australia. They have a very bad rap and for what I have in these heads, I probably could have made as much or more power with some TFS FAS heads. When I got them, they were fresh on the market and the port work was done by Avenger cylinder heads in California. I had about $600 in the bare castings with port work.
Well, I was half right! I have some good money in mine as well and will never see any of it back compared to some good AFR's etc. I'm happy with how it runs though...for now.
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