Lawsuit anyone?

You may not remember, but several years ago, almost every company of lawn mower motor manufacturers got busted in a class action suit about false horse power claims. I think I got 8 dollars. lol The point is, something should be AS ADVERTISED if you buy it. If not, it's either a mistake, or someone is flimflammin some ****.

And all this "what did you expect" helps no one. As someone who contributes a lot around here, yall could lay off that **** with him. That ain't cool. I agree when he said he expected them to be as advertised and similar to other offerings from other companies. It's bullshit that they were not and more bullshit how he's gettin the run around.

I super-size with the guy and everything, but didn't
he get cheap heads because they were cheap? (Edit, I do not think OP said that. I miss remembered).
I mean, let's face facts: the tolerance on the volume in question is what? +/- 1cc? 5? 20?

How exact would a set of trick flow heads be? How much extra does cnc porting cost, to eliminate production variables?

Sorry, but if OP is just now figuring out that Made In China is code for 'stick it to the dumb American, that's on him. Speed costs cubic dollars, and so does going fast. Pay up or shut up.

ESPECIALLY when buying Chinesium online.

I do feel bad for OP, BUT I've learned this lesson more than once in dealing with China