Tubular Upper Control Arm Vendors
CAP crap were the ones breaking at the welds..
CAP got bought out by QA1 over 6 years ago now, just don't buy a used set. The QA1 parts are great.
As far as tubular arms go, it depends on what your going to use the car for. After running hotchkis UCA's on my Challenger, I personally won't run Heim joints on a UCA for a street car. They just do not last on a driver. My first set only went 7k miles, were replaced by hotchkis (great company and customer service!) and the second set will be toast by 10k. For a low mile weekend driver, show car or something that never sees weather they might be ok, but I won't run them on a driver. So I only look at UCA's with bushings.
The other thing to consider is the shape, most of them now have a narrower "V" shape, but there are still some out there with a more rounded "U" shape. Which is fine for most folks, but if you plan on running a wide 18" rim up front you have to check for rim to UCA clearance at full steering lock and suspension extension. Smaller diameter rims can't have the amount of backspace to run into that problem though.
Then there's adjustable vs not. But unless you're planning on some aggressive alignment numbers, like for autoX or road course use, the non-adjustable UCA's have enough extra caster built in for pretty much everybody. And if you're not doing your own alignments or know a good shop the non adjustable UCA's are easier to deal with.
