I got their 2 inch kit which nets 2.5 inches in back and almost 2.75 inches front.
Take my opinion for what's it's worth but coming from rubicon stock suspension with teraflex level kit, this new mopar lift kit is an awesome ride. I mean far exceeded my expectations. I can only assume the 4 inch may be similar but I can not say for sure. In fact I couldn't imagine a better balance in ride quality and responsiveness and stability on and off road.
Mopar nailed this lift in my humble opinion. I would recommend this lift on my mom's jeep (if she had one) that's how fantastic the ride is over what I had before.
I threw the cam bolts away when I installed it. The ride is smooth and soft yet controlled and with only 2.5 inches overall lift I didn't bother caster correcting and it rides straight as an arrow like it did when I had the teraflex level kit. Only slight bump steer which may be the 35s at 28 psi.
It rides ruts and washboard roads like its on air with 35s at 28 psi. I can't say enough how pleased i am with the ride on and off road over how it was stock.
100% subjective I know. But my wife loves the ride now and she commented how much smoother the ride is. That, to me, was telling since she noticed a difference over stock.
The drive shaft is dana. It provides plenty of clearance over exhaust to avoid interference without using exhaust spacers. The Fox shocks are tuned specific to the mopar springs which are very soft. They were developed in house at mopar from what the dealership informed me.
The last 3 inch kit was a teraflex rebrand and from what I read was stiff. Not this kit. Silky smooth and controlled. I'd buy it again if I had to. And the wooden jeep crate came in is awesome and holds all my tools and spare kit.
$1,300 from love field jeep in Dallas. I picked it up myself and installed in three hours with a friend.
Hope this helps.