Another advantage of CM Airbags attached to a subframe instead of the frame: spacers can be inserted between the frame and subframe to easy-add clearance, if needed. My subframe is made from 2"x8" rectangular tubing, and we have not needed spacers -- we are high enough for carefree travel. We followed the CM drawings except: 1) 2"x8" is larger than spec; 2) the subframe has an H-shape to spread shock loads over a much longer section of frame. Shock loads spread over a few inches of frame is the norm and a cause of much drama/failure. The frame engineers know this, but more beef means higher costs.
