Believe it or not, it will pass smog both visually and functionally. It is small, but the metal substrate is very effective with conversion so it does at least as good a job as the old style cat, even though it is physically larger. The flow if the new one is also better, you can see straight through the substrate! The kit comes with a card that you keep in your car that identifies the various approval #’s for smog check. I believe this is the same kit sold by MVP, I bought mine from Lightning Motorsport - they seem to have a direct line to Random. It cost me $600 complete, including gaskets, bolts and shipping. As far as modifying your DP, unless it has a flex connection I wouldn’t advise it. Better to just sell it to someone needing a cat-less DP and buy a complete system that was originally designed to use a cat. It will work out better, believe me.
Bob
97 6-speed