That's the kit we are talking about. I'm doing the full leaf packs though instead of the add a leaf. Like stated above your either gunna need a new adjustable track bar or do it cheap and get a bracket or redrill the track bar hole to center your front axle.

 

You need to take a better comparison shot with both 4.5" springs. I have the 4.5" and my buddy has the 3" and the 4.5" are alot stronger. I'd imagine the IRO 3" are alot softer than the IRO 4.5" as well. Can't compare a 3" to a 4.5".

 

I like Rough Country's springs, but much prefer IRO's long arms. You can always run the RC short arm and get the IRO long arm upgrade later on.

 

If you download the PDF install manual it says just to redrill. Would it be hard to upgrade to the LA kit down the road?

 

obviously, but by virtue of removing one and installing the other I'm left with this comparison picture. I'm merely pointing out that the compression rate is higher, which would attribute to less lateral roll, with the IRO wire diameter. I also can tell you that I'm not quite as worried when I let my wife drive the XJ. I have not seen either a 4.5" RC spring or 3" IRO, so you may be right.

 

I may have to take some installed picks, but I can't pull my springs to compare with a 3".