The Automotive Shock Absorbers from this brand proved to be a letdown. As a result of my tests, I determined that they did not deliver on their promise to improve the suspension of my Mustang. The ride was bumpy and unstable, which is not what I expected from a performance upgrade. On the plus side, they were easy to install. However, it didn't make up for the fact that they failed to provide the better overall ride quality that I was hoping for.