I took nut off and tried whacking it down the pipe, impossible
I think now use a torch and heat red hot to enlarge it, slide on new pipe, then use torch to shrink.
AND this is why these pipes are no longer useable, idiot exhaust worker cuts the old mufflers off, puts in a short stub of pipe and tries to weld it to the original now ruined pipe which he ruined, and can cause dangerous fumes to get into the car, and you can hear it leaking, all to save himself a few minutes.
Of course hiis weld is so bad and slaggy, all the slag falls out and look at the holes it leaves which leak exhaust out.
I have seen this other times on other cars. Rather than even unbolt a connection to a converter, on one car, someone cuts off the flange and attempts a joining weld. That makes it very harder and more expensive to fix.
I would rather they use SS BAND CLAMPS, no welding needed to join lap or butt joints.
My pics too big to post, here is a Gphotos link[You must be registered and logged in to see this link.][You must be registered and logged in to see this link.]