I’ll have to lookMy vote goes for the Dynomax Ultraflo Welded 17221, a bit shorter that the 17223. It has that classic "bark" when the truck starts, along with that nice glasspack rumble. IMO a single 3" exhaust with this muffler just has that "OBS sound"
I've never been a fan of Flowmasters. Catchy name and fancy box is about all they have going for them.