KYB's are a great shock for the money. But in my case I did not care for them on my vette. The vette rode the best it ever had with them, but on my car they did not seem to have enough control. The rear end would bottom out on hard bumps. I don't believe my rear spring is worn out as I had rebuilt it and it still has good arch and maintains correct body height. The other issue was at high speeds, the car would seem to float around, unnerving. So after about 1,000 miles, I pulled them and went with adjustable Koni's. Rear end doesn't bottom out anymore, at triple digits, the car has a hunkered down-secure feeling and the ride is only a tad firmer than the KYB's. This was accomplished with the middle positions and not cranked full firm. But that is on my car and different cars react differently. Charles