Are you going to cut and reweld to get them out or you going to pull of it through the flange? and I wouldnt worry too much about the deposits, unless you are pulling a code.


To cut them i used a harbor freight cut wheel the 14 inch large cutter and then put a iron pipe on the honeycomb (flange side) and beat it like no other (to come out the cut side).. it comes out in one big piece and weld it back up together. Make sure you dimple a couple of spots so you know here the downpipe reattaches when you weld it back...