Thinking about getting the headers and ORY on the Tahoe. If I go with the ORY I will lose my cats right? Haven't really looked under it to see where they are. How do you correct this? Is this where you would use the O2 sims?

 

Yes thats correct. You can either get sims or you can get a good tune and tell your tuner that you put PS with the ORY and they should take care of it for you. If i were you i would go with a tune, seeing how headers can make you run lean (<<i was told this) on a stock tune.

 

yeah i just got my tune and i asked about the pacesetter headers and off road y pipe. the guy that tuned me (westers) said they will take care of it as far as the O2 sensors go and stuff. get the headers and get a tune.