I had this same exact problem. I still do. Honestly I think you are gonna have to deal with it unless you find something that works. i sent my coilovers back to omnipower i think 2 times and they sent them back, said they replaced the shock, and i still have the same problem. its just kind of annoying. i think for me, it was really noticeable cause ive never driven in a lowered car. and omni's are pretty stiff. so, unless you can find a way to minimize the sound, i think you'll just have to deal with it. and if you do find something that minimizes the sound, LET ME KNOW! lol good luck bro