So I just got a divorced down pipe. While trying to take the stock down pipe off I ran into a problem. I got all 4 nuts off the elbow that connect it to the turbo. Then I went to pull the elbow off and it would not budge. Tried hitting around it with a rubber mallet, then mallet and screw driver. Then tried some wiggling with a pry bar. I couldn't get that thing to back off the turbo at all. Any ideas what I should do?