I think I have to correct this statement - I recently came across my receipt from Summitracing.com and it says I got a FlowMaster Super 44 series muffler - not the Delta 40 I thought. Hmm.... maybe that's why it didn't sound good?
In any event, I have a single 2.5" pipe from the Y junction (right after the cats) back to the 2.5" Dynomax Super Turbo (center in/offset out configuration), then more 2.5" piping back to a bolt-on chrome exhaust tip.
Riff Raff - I'm in Connecticut.