I see that there are 'upper' and 'lower' front bump stops available for our JK's. What is the benefit of each and why would you use one versus the other?

 

I can't think of benefit if you are only using one or the other.

 

You use one over the other because that is what came in the kit you bought? Front lowers need to be drilled/tapped, so I guess that would be the negative between the two. Though the uppers can be a pain to get seated up in the cup with the coil in.

I prefer upgrading the lowers. Just a personal opinion, with no real objection to uppers.

 

Yep x3 on that. use what comes in your kit.