So I've searched and searched for a shop to flare a 2.5" pipe so I can do the ISR mod. NO BODY around here (Kansas City) says they can do it. I don't want to spend $$$ on an after market one when one can be made.

So I go looking for something I can use that has the correct OD. Well, found PVC coupler for a 2" PVC pipe that's perfect... The coupler has a 2.7" OD but the ID is 2". This this going to be O.K. I've read the tech and those have 2.5" ID...

 

I got mine done at Midas. Only cost me 8 bucks. Just give them a call and ask if they can make you one with their expander.