I've been kindly instructed to order a new flange piece because mine looks so bad. Suppose it might be rough/rotted enough that it can't be cut and saved, I dunno.
Apparently, the few days it would take to get here would be "too long," because running straight off the DP would be "too loud." Lol
Here's what it is anyway -
Dynomax/Walker 41806, and you'll need a couple bolts. That bolt length seems good. There's still enough room for a nut on the end.
May also need the gasket -
Dynomax/Walker 31532 or 31578. Not sure what the difference is, maybe thickness?