Yea, GP is 'Group Purchase'. I've got one going for the Superlift 2.5" right now. You won't find a better price for the front kit than this. Anytime I want something for my truck I try to get as many people involved as possible that want the same thing. Then I shop around for the best price. Most companies will give us a good discount if we tell them we are buying 10 or more at the same time. A couple of weeks of haggeling and everyone gets a great price.
BDS is the company that makes a 5" suspension lift for the Z's.
Superlift makes two kits, a 2.5" mentioned above and a 6". The 2.5" comes with everything you need up front and you buy either AAL's (Add-A-Leafs) or shackles for the back. You can buy Superlift's stuff for the back but you can get it cheaper from other companies.
