Hey, I have a dp, mid pipe, and catback. I am going to install the dp and catback until I get fuel upgrades. Anyway, my question is should I go try to pass emissions before I install the dp and cat back? Or, just install them and then take it for the test? I just got the car and have to get the emissions done soon. Thanks for the info.

 

I'd leave things alone until you get the emissions test.

 

Get the emissions test FIRST, THEN install that stuff.