Check your splash guards. Mine are falling to pieces and when I turn right the left the right one catches on the wheel and thumps a bit. Really anoying going to go out and rip it off sometime. If its more of a click or a higher knock could be a cv joint, check your boots. Could be loose lugnuts. Check them, i forgot to tighten my rear ones after i bled my brakes and every time i turned right it thumped. Got home and they were about off!!!!