i was wondering if u have to use the rear coil spring isolators? because i was wondering if i remove them i was thinking that this will cover up some wheel space? what do u guys think?

 

Many people claim to have taken them off with no problems, and some of these people auto-X or road-race their cars.... I personally left mine in since I need all the ground clearance that I can get (true duals).
IMO, give it a shot, see how it performs, and if you don't like it, it isn't very hard to put them back in. Good luck.