Are you talking about front or rear coil overs. If rear than you SHOULD get front coil overs too. If your talking about front coil overs than you may want to get rear LCA's wit adjustable spring perches. But thats an expensive route if you wanna do it right. Most cheap coil over kits will mess up torque boxes in the rear and can destroy the front strut housing and CC plates if you have 3-bolt CC plates in the front. If you wanna go that route call up Maximum motorsports and talk to them...but it will be expensive. If you want improvement at a good price without the risk of breaking anything (with cheapo coil-overs) I would go with the eiback drag launch stuff.