i would go with the RPM extended a-arms instead of the 2.5 stock a-arms just because of the lifetime warrenty. but the 2.5 a-arms have more adjustments.but, there is no point in replacing everything until u break everything, so go run into a tree, and buy my a-arms. lol. I think the difference between the .15 a-arms and 2.5 a-arms is like a total of a half a inch or somethin, i forget.
later