I installed the Firestone Ride Rites without taking apart any of the suspension. But be forewarned it was absolute pain in the C$&@!! I put the frame on very high jack stands design for heavy duty trucks and let the axle drop all the way down with the tires still attached. There was just enough room to wiggle the bags soaked in tire shine. I do notice it does provide a more firm ride even at 5 psi but overall I am very pleased with ride quality so far. We will see how they behave on city streets soon. Also I would like to note that several people and distributors state at minimum psi that the airbags provide zero lift. And based on all my before and after measurements these statements are false. I gained a 1/2 lift at 5 psi and I verified that the top of the bag isn’t in contact with the factory rubber coil spring isolator. Please take that for what it is worth. Outside of some nicked up hands and coil springs all faired well...now I hope the hold up like the other Firestone black airbag kits.