Okay, when I tried to put on my flex section on my Star DP I put it on the very end of the DP so the flange was on the end of the Flex Section. I didn't know that the flange was supposed to be at an angle so when I bolted it up I had a exhaust leak between my DP and testpipe. Now I'm gettin ready to upgrade my exhaust to 3" and I might as well upgrade the DP/ fix the leak. I was thinking of putting a 3" flex section in the downpipe but have a few questions:
1) Do I need a transition pipe for the 2.5" DP to mate to the 3" Flex 2) Where can the 3" flex section fit 3) Do I need to remove the DP to do this? How to exhuast shops get the flanges to match up perfectly?