I'm thinking about picking a 2nd hand mopar lift and was wondering if I'm gonna need wheel spacers?

 

What size tires do you plan on running? Also...you have a 2011, as far as I've seen even a mopar lift will void your warranty so be ready or make sure you know a "mod" friendly dealership. I'd imagine that with that mopar lift you can go atleast 33s if not even 35s since it is a 2.5" lift. I'm pretty sure you will need spacers unless you replace your wheels with new ones that have 4.5" or less backspacing. The issue being that as you increase your tire diameter, when you turn the wheel they will come to close to your control arms.
If you decide to go with spacers give me a shout. I have a set of spidertrax spacers that were on my JK for about 2months that I'm thinking of getting rid of. Put them on to run my stock tires with my lift and after my gears were done and finally got my new tires and wheels I took them off.