[mustangjohn]

Air bags and weight jacker LCAs serve two different purposes. Weight jackers adjust ride height and airbags are just to prevent spring compression. If you did use the airbags to raise the rear end the car would ride very harsh since you make it much harder for the rear springs to compress.

The spherical bushing do transmit more noise, it just depends on what you consider loud. Mine rides fairly quiet, I think.