airbags got me into the deep 1.6 60'
but a bar can get that even lower
you can run the atr/agressive , bmr/gbodyolds or the HR partsnstuff bar with airbags but you really dont need to run bags with them
with the larger bars bags are for the most part used to raise the car for heavy loads or to run larger tires without worry of hitting on the fender lips
the hr bar is adjustable to tune in the launch to be perfectly flat , the other bars that bolt up to the control arms arent adjustable may still twist a little but much less than the stocker , if you run airbags you can do some tweaking