P30 Suspension Overhaul

I think for 27ft MH's the bag replacement is fine. The OP's MH is much heavier The coil springs do wear out after many miles of driving and you will lose ride height that new bags will not compensate for. I replaced my front left bag(which is not hard to do) and with it fully inflated it would not return the ride height to spec. I eventually had to replace the coil springs with the super steer coils from Henderson. I had about 50k miles on it at the time. It rode much better and gave me the proper ride height. I now have over 120K and the ride height is still good. If have zero ride height now the bags will not give you another 2.5 ins of ride height. Just measure the distance between the bottom of the upper cross member and the lower A arm and you should have between 2 - 3 in gap depending on which P-30 chassis you have. Henderson will give you the exact spec height based on the weight of your front axle and the proper coil to match.