i know a lad who has a mk4 cabby with power steering..its genuine ford stuff fitted at the dealers as the car was originally a motability car..i wanted to buy it off him until i tried it..there wasnt a lot in it..the gains dont justify the cost or chew on fitting it imo..maybe electric pas may be better..i fitted a new standard rack and the steering is much lighter..prob a knackered rack is the most common cause of heavy steering