this might be a dumb question. but to the ones that are tuned on neptune or chrome or hondata i was woundering if can you pass emissions on what your car is tuned at. or do you have to take the turbo out because that is what i have seen some people do. planning on boosting so any advice would help. thanks

 

I know it will not pass in California smog check...

 

well, depends; but if ur car is OBDI, your tune must be clean enough, cause all the sensors etc will be there and no CEL.