I understand there is a fuse you can pull to keep your dual mode in the "wild" mode all the time-
http://www.camaro5.com/forums/showth...&highlight=npp
Otherwise the only aftermarket exhausts I've seen for the V6 are single tip on each side. The only quad tipped I've seen is a very expensive cat back system for the ZL1 that is 3" in diameter all the way back.
I'm sure your NPP system would sell well in the member's classifieds.