want to put headers on my 89 firebird 305 what can i do or get to pass these California smog test , I'm new to California don know the laws

Make sure they come with a CARB number. Some do, some don't.

Welcome to the board!
California has the strictest emission regulations in the country. If you modify your vehicle, you must buy parts that state "50-state legal" and come with a CARB (california air resource board) exemption number. If you parts are not clearly labelled as such, you will not be allowed to pass your visual inspections.

Make sure they have hook ups for your air smog system. It will hook up to your existing smog system and should be fine. To be safe, call your local emissions mechanic and ask them if thats cool.

also called an executive order, or E.O. number.
you can look those up here i believe.
http://www.arb.ca.gov/msprog/aftermk...ftermktqry.php
and heres a thread that has basically what you need to know about smog.
it wasnt a smog thread originally but it veered over in that direction.
https://www.thirdgen.org/forums/nort...third-gen.html

Any suggestion on what to buy
thanks for the info

Edelbrock has some that are CARB Legal

i have smog legal edlebrocks on mine.
the easiest way to see if they are is to look in the description. if it says "50 state legal" your good to go.
just shop around and when you find some you might like, if it doesnt specify that theyre 50 state legal, ask the manufacturer or supplier if they have an E.O. number.