Roger,

In the rules under STS and Engine it states: Headers, emissions-legal

It does not go into detail about emissions on the page you linked. I would think because I have a CAT that is 50-state legal in my S-Shop Y that I would be OK, because it is emissions legal.

Let me know where I'm wrong..... I'm sure I am.

Money doesn't always bring happiness. People with ten million dollars are no happier than people with nine million dollars ~ Hobart Brown