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Yes and they vary as much .010-.020", which is just WAY too much to have a good seal. Our acceptable tolerance difference is less than .0005, you do the math as to what issues that can cause if done improperly.

Thank you very much for the praise, we strive to provide the best quality products are a very reasonable price. It means a lot to have someone in the industry notice the quality in our products :)

Considering it would cost me more to have someone else make my product than it would for me to just make it, even in china, what motivation would I have? We invested a lot of money in this company over its 20 years and I promise you that all the stuff that is paid for around this shop makes it...

I have no idea why someone would say that. This whole situation has cost us a lot of money, KCR357 a LOT of money, and possibly damaged our reputation with people who aren't on the forums that got a fake head, blew up an engine, then associated that chinese junk with our product. Bad situation...

Yeah, we surely owe Chris a thank you for discovering this whole mess, I'm honestly not sure how long it would've taken us to find out otherwise! It just shows the kind of attention to detail he has, which is a good thing when you build engines for a living!

We don't "outsource" any billet products as we have 5 Haas machines that are all paid for. Why else do you think we can offer a complete 701 head kit for $100 less than anyone else?? We only use US made 6061/7075 aircraft grade aluminum and 303/416 stainless to produce all of our ADA Racing...

Hi everyone, Unfortunately there are some floating around that have the date stamp, but the only stamp I've seen is this 10/09. I have not had any sent in that had any other date on them, and as far as I know the number of these out there is pretty limited. KCR357 did right by as many of his...

Matt_E is correct, our head will work for you if you buy the optional exhaust bracket which retails for $29.95. Most people don't use them because the the B pipe is more popular but you'll need it with the pro-tec, or any pipe that mount to the head, including the stock one.