I put these spacers on my 2014 Lexus IS 350 F-sport. Had them on the front but after I got the car lowered, the front is way too aggressive that's killing the fender liner, so I have to take them off. These are high quality aluminum bolt on spacers, I paid $150 + shipping for them, my lost is your gain. Used them for about 3K kms, no shaking whatsoever. Part# on Eibach web site is
# 90.4.20.013.1. Includes all the hardware required to install on the car.