Installed them on my 2018 Subaru WRX STi about a week ago and so far they are working great. I am currently running stock suspension, 19 inch wheels and stock tires. There is no friction, no vibration at high speeds, no noticeable difference in handling. The nuts provided fit snugly and bolt the center hub seal to the vehicle. Screw the wheel with the standard eyelets onto the new spacers. Overall very easy to assemble and makes a very noticeable difference in appearance.