I put Walker quiet flow SS mufflers on the convertible.
Walker 22154 Quiet-Flow Stainless Steel Muffler, but it really was too long to fit well (29").
The Walker #21498 quiet flow SS (fits a 2004-2006 Chrysler Pacifica) show s to be 2-1/2" in/out, and just $64 from summit racing, just have to cut off the welded on muffler hangers. These are smaller 13" long case mufflers 20" tip to tip. Says they are a turbo style muffler.
Looks like the outlet tube may be angle cut for the exhaust exit? It could be cut straight and swedged to connect to the tial pipes?
Found a picture of the 22154s on the convertible, these are long..