Correct, the flowmasters for pre-LT1 corvettes will NOT fit a 96. The 96 LT1 system (cost about 600) bolts in behind the cats and replaces everything behind them. Flowmaster systems are also not compatible if you decide to change the mufflers later on, because the bends are slightly different, and the pipe size is 2.5 inch, and all the other systems out there are 2.25 or 2.75. So, Flowmasters are the cheapest of the group of cat-backs, but you won't be able to mix and match (but the front of the system is stock size and location, so any header/cat combo that is supposed to fit stock exhaust will fit the flows)