Well, here's your apples to chop sticks comparison: Butler Performance, out of the box 72 cc Edelbrock round port heads, hydraulic roller springs?, $2399.95.
(from Butler Performance web site)
Speedmaster Pontiac 72 CC heads, hydraulic roller springs, round port $ 1857.90.
(from Speedmaster web site)
$542.05 a pair less for the Speedmaster heads a set. 23% less for the Chinese heads.
I guess if they perform as well, do what you expect, and don't have issues, you have saved $550.00. If they perform poorly, won't hold a head gasket, drop valves, drop seats, then you know the results. I guess we need 20-30 brave souls to buy a set, try them and report back to see how they do. I doubt any have been installed in Shanghai and put to the test before they hit the market. So someone over here needs to prove them out.
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