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I honestly think that in nebraska you would have to roll your car on its roof and an officer would have to casualy notice you had no cats for anybody to say anything about it.
only inspection we have here is they make sure the vin on the car is the same as the one on the title and thats only if you bought the vehicle out of state.
The stock cat on this truck has a tapered entrance that narrows down to like 2".
My headers have 3" collectors and I want to make it as free flowing as possible. I know about the surface area issue I was just wanting to know if there has been a test on whos cat was cleanest.
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