I had these installed last week and did a bunch of 0-60 launches to see if I can better my times. I am hard pressed to say that the spacers reduced the tire hop for me at all. I was unable to beat my 4.5s 0-60 time. In theory it makes sense, and maybe it'll reduce some of the wear on the rest of the suspension, but in practice, the wheel-hop is still horrible. Maybe I just have too much power! :)