I had these springs custom made for my GX470 by Coil Spring Specialties in KS. We based them off a 2007 4Runner, V8, 4WD; then added 15% higher spring rate, 200 lbs additional load capacity, and 1.5" height. Net is, on a GX they ride quite nice and are a great way to dispose of the airbags, and provide 1" lift over the airbags at Normal ride height. I suppose on a 03-09 4R, you may get a bit closer to 1.5" lift. I ran them for about 9 mos on my GX. $125 shipped in CONUS, located in the Raleigh NC area, pm if interested.