Legal Headers?

I bought some headers for my 99 Sentra GA16DE that werent name brand like DC or Hotshot or anything like that, but they have all the bungs and locations for the sensors and such, are they legal in california or do they need a little seal or stamp that says they are legal?

heres what you do. go to your local hardware store and buy a rotary tool. then you take your headers and make your own C.A.R.B exempt logo and you are good to go

lol regardless if they are considered legal they need the stamp in order for you not to get hassled
this goes for pretty much any part