TMD advertises the heads are made by Pro Comp.
Pro Comp is an Australian company selling Chinese manufactured rip-offs of other companies products, with substantially poorer quality. The Aussies don't have a very high opinion of Pro-Comp.
The heads are copies of the CHI 3V head. You can expect they are cast with a less expensive alloy, the heat treating is not up to par, and the machining is not as well executed.
Beware of TMD & Pro Comp.
cowboy from hell
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