Procomp does that but the rough country lift is completely bolt on and you can take it off if wanted. Here's the link to rough country, and it even has instructions. http://www.roughcountry.com/toyota-suspension-lift-kit-770s.htmlYou don't have to cut the cross member? I was under the assumption you had to do that for the 6 inch lifts
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And here's a link to the thread on it, several guys running these kits already on 4runners. http://www.toyota-4runner.org/showthread.php?t=151962
Keak over on the toyota 120 forum has this lift, with coilovers cranked up and a 3" body lift running 40" tires. He recently sent down to 37's though.
Sent from the drivers seat of my 05 4runner.