Plenty of cars that have the Stealth heads are driven regularly and raced without issue. Good luck in your quest to prove yourself right, but it won't happen. Too many Cheap Bastards have had success with these heads, and many more will in the future. I could post links to threads that show this, but it's pointless as your mind is made up solely on where they are produced. It's not 2003, when everything from China sucked, companies have had to answer for those mistakes, or they've long since gone out of business.