I put a set of Mammoth shocks on a few months ago when I put my leveling kit with springs on. The are the black ones though. My wife and myself were very supprised on how well everything felt compared to the OEM suspension at 112K on our '15 JKU Sahara.

 

What it dont tell is most important. 4"-6" lift is very vague what are the numbers? 2" is a lot
what are they full extension, what are the fully compressed. in inches or MM. Then what do you have in inches?

Longer shocks the spring need to reach enough to stay in compression. Why top end springs tend to have dual rate or progressive springs to reach longer. Height of lift is only one factor really making springs.

shocks (most)as they get longer so does it body. the compressed length is longer. added bump stop is need so they never become a bump. exception is those metalcloak six pack shocks that are Bi directional. they have longest extension and shortest compression of any. up to what 14" of travel.

How far can your springs reach? rear is the main issue since they can spit out if unloaded. Fronts will unload but spring is held in by upper bump and most jeeps have added lower bump to catch it. they wont seat right though when they get loose. you do not want to be over shocked or under.

after you know what you have you try to fit the shock so it at about 50% travel +- on the ground.