to change the filter box takes about an hour, mainley looking for two items now that i know what i need it is a 10 minute job. the box is direct bolt on change. you have to make one small bolt on plate to cover for a port near the ait sensor. the hose connection is larger and it took a while for me to find a coupling. the easiest thing to do is to cut the piece off of the 5. 9 box and stick it inside the truck hose, this gives you strenght to the hose for a clamp. the outside diameter is the same for the hose and box so now all that is needed is to connect both with a short piece of hose. looks good. i found a joint of pipe that was the size needed so i did not have to cut up my 5. 9 box