Air Care Results for Bassman’s Beast

By reading it, I would say its mainly due to your fuel system getting a more complete burn.  There are 2 main things you changed your new cat converter and your new ignition system.  Both will significantly reduce tail pipe emissions.    If you not your NOX have gone up, thats due to a higher combustion chamber temp.  The engine is burning the available fuel and running a bit hotter, if you would have turned your fuel pressure up a bit more, the nox would have went down, however the rest of the results would have went up.  IN either case, it sounds like your car is running really well.