I am looking to add a lift and for awhile and had been dead set on the RK 3.5 mid arm and 37's, but after seeing one with this setup in person I feel like I want a lift with a lcog. My debate is between a rk 2.5, evo 3 or teraflex 3 in. I will be running 37's and flat flares. My concern is that since rk runs taller will the 2.5= the 3in? Right now I am leaning towards either the 3 in evo or teraflex. I understand there are multiple threads on this and I have searched but I am still unsure. Would like to know peoples thoughts and pictures? Also what's the difference between teraflex linear coils and rk progressive? Thanks.
***This will be a DD, and will travel 100+ miles on the highway a throughout the year. I will go offroad as much as I can. Plan on hitting Moab in a year or so*****

 

The RK can handle longer shocks due to the progressive rate springs.

The Teraflex will feel a little tighter on road due to Clevite rubber bushings in their control arms, but they cannot handle as longer shocks as well as the RK arms with polyurethane at the frame side control arm bushings.

I like the Teraflex trackbars better for on road and the RK trackbars better for off road.

The other one you could consider are OME springs with Currie Arms and JKS trackbars--Northridge4x4 OME long travel kit.

I've never installed an EVO lift.

As disclosure, my 2 dr has what are essentially Rock Krawler long arm components, but I had the Northridge4x4 OME LT kit with Currie arms and Teraflex trackbars before the long arm. My wife's 4dr has EVO coilovers with a Teraflex long arm, but I plan to replace the rear upper arms with an RK 3 link upgrade. My son's 4 dr has an AEV lift I want to replace with either an RK 2.5" kit or with 2.5" Metalcloak springs and Currie Arms.

 

I'm also interested in maybe just building a lift around aev 3.5 coils which I believe are progressive.

 

AEV coils are designed for heavy rigs.

In my experience, they are too stiff for jeeps that don't have really heavy bumpers and armor.

 

Not trying to muddy up the water but have you looked at Metal Cloak? They make a 2.5" lift.

Of the ones you listed I think EVO would be the way to go. My experience with TF is not bad but think EVO would be better. My 3.5" MC lift blew the TF lift away. Not that it was a bad lift but MC is far superior in my opinion. I have no experience with RK.

 

RK are also progressive. I'd look at the JK 2.5 X Factor System or 2.5 X Factor Long Arm System with their shocks.

 

IMHO whatever Planman suggests I would really consider looking into. He's been around and know what he is talking about.

 

I have the rk 3.5 and its a nice kit. The prob I have and every other one I have seen with rk lift in person leans bad. Between half inch to inch down on pass side. Rk clams its cuz gas tank but don't make any diff full or empty. Just heads up.

 

Only the fronts

 

I run a currie 4" with 37" MTR's. I don't know how it would ride with less lift. As you can see no extra room here, I even had to cut the ends of the bumper off to stop them from rubbing. If it's a mall crawler I guess you'd be ok. Be ready for large bumps stops and not much travel if you go that route with 37's. 2.5" lifts are usually more for 35's.