I found the same thing. I'm hoping by modding my unreasonated 2.5" X pipe I might reduce/eliminate that drone. I've been looking forever for someone selling a polished SS resonated H or X pipe for a 2+2. Or even willing to trade + $$ for my polished SS X pipe.Also noticed a warmer floor area close to the tranny tunnel. I was also looking to see if my soundproofing efforts will address that when I do the remaining front half of the car. I'm not sure if the DP's and TP's changed the exhaust note though since I changed out my mufflers to LaBree's (Sebrings) around the same time I installed the DP's and TP's.
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