Rely on my Deville 98 to bypass blown rear air shocks and a broken compressor that doesn't work . I installed them the same day they were delivered, the dampers fitted the car well, now 2 weeks later and the car sagged again, lasted maybe a week max. You fall on every bump in the road, especially when overcoming speed bumps you can compensate for the downward impact. I give 2 out of 5 points because the shock absorbers arrived well and quickly. Now I have to restore my compressor and new shock absorbers