4" just isn't going to happen...
actually I take that back, there is a subframe drop of 2" and then the 2" spacer lift would give you your 4". BUT that makes 0 improvement for ground clearance.....
Listen. the WHOLE point of a lift is to be able to install larger tires, The largest tires you would want to install on a patriot is no more than 30". A 2" lift, or even just a 1.5" lift is PLENTY to fit that large of a tire.
Why such a small tire?
1) engine power, there just isn't a lot of it to spin tires bigger
2) gearing, one way to make up for less power is to change gearing in your axles to allow for bigger tires, you cannot do this with a patriot, and the gearing is very high.
3) drive line strength, you would just cause the suspension to crumple with larger tires.
4) braking. Larger tires = more rotating mass, the brakes are simply not up to the task of stopping heavier tires.
To Honestly do it, you would need to replace at least the following:
1) lower control arms
5) brake lines
8) rear pumpkin
11) engine management system
by the time you're done, you would have in excess of $10k into a vehicle with marginally better off road performance. You could buy a older built TJ for that kind of money that would run circles around the patriot. and still have your patriot getting good gas mileage.
I have not looked into what kojack is talking about, but if I were look into a lift, I think I would prefer the 1.5" lift (plenty to fit the largest tire size I would dare fitting) BUT i would want it to be able to allow me to run with my sway bar disco'ed, but not in danger of binding the cv joints. I felt the biggest limiting factor on my MK (out side of not having a two speed transfer case) was how often I had only 2-3 wheels on the ground, that extra travel given by disconnecting, even just an inch either way would go a LONG way into improving offroad worthiness, and I would invest in at least an LSD, if not a locker.