So UPS delivered my full FMF exhaust today for my 2004 KTM 450 SX. The powerbomb header went on, next was the mid pipe then the muffler. Well the muffler wont slip over the mid pipe. No burs on either to speak of but I took a file to the ID of the muffler anyways. Im pushing and pushing and it wont go over. Im thinking the the mid pipe OD is a hair to big. Im a bit angry right now, i wanted my $700 exhaust to fit and be installed for this weekends trip to Glamis. I have the mid pipe in the freezer trying to shrink it, and a map gas torch to expand the muffler. LOL it worked for me before on auto parts. Anyone have experiences like this with FMF or have any suggestions to fit it up?