MAP Posted February 9, 2014 Share Posted February 9, 2014 Have any of you guys in California replaced the catted uppipe with a catless uppipe and had any problems passing smog? Does the car need to have the tune changed if the uppipe is replaced? I'm not trying to make more power, just increase reliability by getting rid of the catted uppipe if possible. I don't want it to destroy the turbo. If I get improved throttle response.. even better. Link to comment Share on other sites More sharing options...
urfsin Posted February 9, 2014 Share Posted February 9, 2014 Yes you can pass if the rest of your cats are in place (stock). I have passed twice this way now. Slide It Sideways Link to comment Share on other sites More sharing options...
MAP Posted February 9, 2014 Author Share Posted February 9, 2014 urfsin, Did you change the tune on the car? Or is it still stock? Any difference in throttle response? Which brand did you install? Thanks for the feedback. Link to comment Share on other sites More sharing options...
JJr Posted February 9, 2014 Share Posted February 9, 2014 If you use a catless from a 07 ( I did), I can't imagine any inspector being able to tell the difference. Aftermarket is a different story. Shouldn't need a tune, do a stage 1 tune anyway it's better than stock! Link to comment Share on other sites More sharing options...
urfsin Posted February 9, 2014 Share Posted February 9, 2014 urfsin, Did you change the tune on the car? Or is it still stock? Any difference in throttle response? Which brand did you install? Thanks for the feedback. No, I left my stage two tune on the car. I just drove super mellow (stayed out of boost) on the way to the smog shop and the way back home. No problems passing. You got this in the bag. Slide It Sideways Link to comment Share on other sites More sharing options...
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