from the site reads those are just tubular versions of the stockers.they offer no geometry gain and you'll only lose weight in your wallet..if you're gonna spend that kinda money on some arms go for a set of uppers that offer more caster,pair that up with a set of taller ball joints,a new and improved alignment and you're ahead of the game.Thanx to everybody so far. I know what I’m doing about the sway bar. Now onto the tubular control arms. What’s the opinion on PSTs products?They’re one set with stock ball joints is $899.00. $300.00 less than UMIs which have the 1/2 inch upper ball joints that I do want.