The single cat set up comes from the 93-95 Z28 this is probally what your buddy was talking about. Most 96 and up z28's used the dual cat set up. If you are looking for a magnaflow cat back email us at
streetofdreams2004@yahoo.com . Members of the njfboa recieve a HUGE discount on magnaflow systems, mufflers and converters. Many of the members of this board can vouch for us having met us at englishtown or whiskey this past year.( see "flyerd magnaflow demo SS camaro" in previous postings). Just a note about your year camaro, we have found the the 98 and up magnaflow system 15684 system fits much better that the 93-97 15620. Again this has to do with the single cat vs dual cat set up. ( The 15620 also fits 85-92 with slight modifications)
Gm made a model year change someting in early 96 , and never bothered to tell anyone so you must make sure which set up you have. The magnaflow system on an LT1 is amazing, much different than on my LS1( it all has to do with cam shaft timing and duration). Good luck , and hope to see ya at spring english town, it's only 4 months away.