It might slightly, but you're so far in the green that you have wiggle room here. Take some from HC and give it to the NOX.

And forget the water injection. That's not really what it's designed for anyway (unless you're running more than 15 pounds of boost), and it's hard to set up just right. Takes a lot of trial and error. You could actually make youre emissions worse if you're squirting too much water, or even blow your new engine up (water doesn't compress like your A/F mixture does, compression skyrockets, temps go up, and stuff breaks).

This formula will make almost any car pass smog no matter what:

New cat, oil change, engine flush, pass or dont pay additive, new plugs, water wetter, rad fan constant on.

Some of that might be overkill, but that has ALWAYS worked for me and many of my friends, no matter what the problem was. And my problem has always been NOX. <img src="/forums/images/graemlins/kewl.gif" alt="" />