Superlift Shock Absorbers Recommended when towing greater than 1200kg in handbook for sedan. Does anyone have these: (A) how do they work - talks about adjusting pressure in handbook. Do you need to pump them up? (B) does it raise the height of rear end of car? (C) is suspension in rear stiffer, uncomfortable for back seat passenger when not towing. I will be towing Jayco or jayco type camper trailer about 1600kg. Looking at getting camper underslung which is about 10cm higher than normal Jayco Touring version. May need extra height at towball and stiffer suspension.