I tackled this as a DIY project and it took me about two hours. I used the DIY directions that is posted with the pictures and the directions were pretty easy to follow..but I didn't get one of the DV's seated right at the bottom and ended up with a boost issue...so I ended up having an indy chase it down....I should have taken out the ford compression clamps and replaced them with the stainless screw band type....don't make my mistake.