ok so right now I'm sitting on a rc 3 inch lift and i wanna go to the 4.5 i know ill need an sye is there anything else i could possibly wind up needing to do

 

New shocks, extended brake lines (or relocate them), new LCA's, new trac bar (or redrill mounting hole). I think thats it

 

If i am not mistaken Rough countrys shocks come in 2 sizes to them... 3-4.5 and 4.5-6 or something like that. So you probably dont need new shocks.

But as Dynamite said, brakelines, adjustable trackbar, control arms (lower).

something to mention.. longer sway bar links or disconnects.

 

They might, I don't know much about RC's stuff.

 

Maybe some adjustable uca's to dial in the alignment.

Oh and Bigger tires to fill the larger gap in the wheel well.