Just want to share some pics so you guys know how your OEM cats look like without the sheet metal.
I bought this OEM section 1 couple of months ago for $250 shipped. Previous owner said it was damaged. I have a lot of E46 M3 leftovers parts at home. My goal was to replace the damaged cats and put 2 OEM E46 M3 s-pipe resonator instead to create an anti rasp pipe if the cats were really in bad shape. But I previously modified a couple of those section 1 and I was pretty sure the cats were fine.
Here is what the damage look like:
So I cut the damaged area to see if cats were in good shape. I cut it like this because I was maybe going to reuse the sheet metal.
Then what I taught was confirmed, the cats were in perfect shape, YEAH!:
Then I fabricated the bungs. The o2 sensors bungs are Vibrant 45deg bungs. The EGT sensor bung is a M14X1.5 screws (or a VW wheel bolt) that I drilled in the center to a 7.45mm ID, 25mm long.
Here is the final result:
Hope you enjoy!