Yeah it would be pretty smart of me to run a catalytic converter of any kind with nitrous huh! Also don't single me out dude, you know how many people have high flow test pipes that have never had a problem. You want to have an attitude don't address me address all the luders! I was just posting it to help you out if this was what you're looking for. We've got no emissions in ohio that's why I run this, and successfully at that!