I know that after changing out mine, on the H&S Black Maxx the EBP reading is about 1-2 at idle and slightly up from that on high idle. But like stated above, you will need to see if your tuner is reading absoulte or not and go from there.
DONT push the stuff into the up pipe as you dont want that goign through your turbos and chittin out the bearings or anything else. Take the tube off the truck and spray out with brake cleaner and then some compressed air to finish it off. Then put a sensor back on it and install on the truck. Makes a good bit of difference to have a good clean reading sensor forsure.