Question i had was say you do get the 2nd o2 shut off with hptuners and have a catless dp. If you go to take emmisons and throw the stock dp w/ cat on will they know that the 2nd o2 is turned off?

 

HA HA HA!!! In AZ we don't have to pass emissions for 4 years! And the citys up north don't require emissions testing so you just have to register your car up there. I LOVE AZ

 

You may not have emissions testing but you are still breaking the law by removing emissions equipment. I think even putting on an aftermarket CAT might be illegal before 80k miles.

 

im runnin ca header xtc catless dp an gmpp cat-back. its loud as hell but i like it an i get compliments on it catless ftmfw

 

What 02 sensor?

 

You HAVE to run an O2 sensor, you don't need a rear one but it has to have a front one to know how to run.

 

Here in South Carolina, we don't have emissions tests at all . My 3000GT right now has full exhaust with no cat, and it sounds nice . I love the sound....if I had emissions tests however, I probably wouldn't have it. It's not worth the trouble of taking off, and putting back on just to pass.