Upper Control Arms... Boxed vs Tubular

[H2sRock]

I'm looking at upgrading the UCAs what are better boxed or tubular and why? What ones would you get Cognito or Kryptonite? This will be going on a fabtech 6" lifted H2 running dual shocks.

 

[Renagade132]

Definitely Kryptonite's in my opinion, also Kryptonite's are guaranteed for the life of the owner, not sure if cognitos have the same kind of warranty.

 

[Big2dabank]

I don't think the fact that its tubular or boxed will make that much difference for a UCA, the stress it at the ball joint, so the import factor about the UCA is the ball joint, joint angles, ease of serviceability/replacement of the ball joint, and of course price. I personally like the Kryptonite because the warranty is hard to beat, but there is obviously a price premium over the cognito. I also like these Camburg UCAs because of the uniball joints, which are rebuildable and have a little more travel than the moog severe duty ball joints. I also think camberg makes a dust cap for top of these to keep dirt from shortening the life of the joint.
http://camburg.com/all-products/01-10-hd-25003500/chevy-hd-performance-uniball-upper-arms/

It all comes down to preference and how you intend to use your rig. If your going to see limited offroad use, I think anything other than factory UCAs might be overkill. I have 197,000 miles and am not gentle with my rig and I have only had to replace the UCAs twice over the life of the rig, thats about 65,000 miles per set (1 pair of OEM and 2 pairs of replacements).

I currently have a set of custom UCAs with moog severe duty joints in my shop, just waiting on the current set to start to fail.

These are my custom UCAs with airbags I am working on, but its a slow project that is not high priority right now.