Originally Posted by gunrun45
It basically just needs the oxygen sensor bung and be durable.
As easy as you make that sound, It's not true.
In CA even with the Howeell efi "which deletes many emission components"
Your header needs to be C.A.R.B. certified and also must have an EO#.
Those are what makes a header legal in CA.
The compliant header will unfortunately come with the AIR tube ports which will need to be plugged/caped.
As a side note, Borla's ss header is the best, But it's pricey.