Eibach Stage 2 kit...replace UCAs or not..

As the title says...looking to do the Stage 2 Eibach kit...have a Limited Long Bed TRD OR...thoughts on replacing UCAs or will the OR ones be ok?

 

I've got the same kit and was planning to stay stock. I'm setting mine at level, so about 1.75" I think.

 

Below 2” of lift should be fine. At or above and you need to look in to them. Aftermarket UCA’s usually build in more castor to correct the alignment. When lifting the front end, the two a-arms (upper and lower control arms) move in slightly different arcs, losing castor as the wheel extends downward (or the vehicle body is lifted upwards). But each truck is a little different. Mine was barely in range with 2” of lift in the front; any more and I’d need them.

 

It’s 2.6 preset on the front. Might as well just do the UCA I guess. Thanks.