Joined: Nov 2016
I've heard that a lot of these have bad core shift, and on some, the mating surfaces aren't even flat, so no matter what you do, they won't mate with your heads properly. Probably just luck of the draw as to whether you get a good one.
There are a lot of really good manifolds out there that wouldn't be a crap-shoot. Saving yourself $50 or $75 to get something that may not work at all, vs. spending the money for the 'real deal' and getting a Stealth or RPM? I know which way I'd go. If you want to save money, see if you can find one used.
Summit has lots of good products, and some are their own 'no name' things. Intakes though, I have not heard good things about.