I lowered my car, near 3-3.5" all around, the rear was actually lowered about 4-4.5" but i put air bags in to even it out. Anyways....this noise I hear isn't constant...it happens like every few weeks or so...I can't figure out for the life of me what it is. It's coming from the rear passenger side wheel, kinda like the spring isnt sitting right, but I know that's not it because if I let the air out of the bags it still does it. The sway bar end links were cut down and welded, new bushings on those. The wheels are tightened properly. If anyone has a suggestion please be free to speak. I'd like to correct this problem because it's so loud it sometimes competes with my stereo.