Moog is made in many countries and you may still find some made in the USA. I have always used Moog, but now think it's to much of a hit and miss. I am leaning towards Proforged but don't like that they are made in Taiwan. That's right they aren't made in the USA. They do get good reviews though. I found this explanation, by the CEO, on a Chevelle forum.
There are a few countries that produce the majority of steering parts these days: India, Turkey, China, and Taiwan. Some are still produced in the US and Canada, but mostly they come from overseas or are marked as "Assembled in USA."
For the most part, the quality coming out of India, Turkey, and China ranges from pretty low to downright scary - there are a lot of quality control issues, the fit and finish is not so great, and the durability is pretty poor.
The quality coming out of Taiwan is excellent...a big part of the reason is that it is a democratic country and a military ally of the US, so our government has pumped a fair amount of money and technology there over the years.
99% of our parts are made in Taiwan and every product that goes out the door is labeled with the exact country of origin. We spend a lot of time and money ensuring that our products are built to our specifications.
I personally take issue with "Assembled in the USA" because I can't tell where the components are being sourced from. For a Moog ball joint that is labeled "Assembled in the USA," are the ball stud and housing made in China or Taiwan? There is a HUGE difference in quality between the two.
A ball joint that is made and assembled in Taiwan - in my opinion - is much better than a ball joint made in China or India and assembled in the US.
Sorry to say that we just couldn't be in business if we had to make parts like ball joints in the US. For small production runs, the cost is 5x as much domestically. That would make a $20 ball joint cost $100.
Hope this clears things up.
Zack Kanter
Founder & CEO
Proforged Chassis Parts