So got a ref ticket the other day in Cali. I have a 96 GSR motor in 91 Civic. I have recently purchased DC headers w carb sticker, stock intake and air box and also have carb stickers for my intake manifold. I am also planning on buying a new 02 sensor bc i have been getting a check engine light for that every so often. and im gonna throw my cat back onto my exhaust too. From your experiences what are some things i need to know before i go into the ref station...my car is done clean and done right. it runs good and other than the 02 sensor i havent had one check engine light...please give me any insight or advice u can. if you live in SD and have had your car reff'd where did u go and how was your experience. thanks in advance for your guys' help :-)