Sweet dual side glasspacks
You are correct, it only applkies to the model years it was sold for. For instance I have an 06 which it was not designed for. Actually we have the GMPP intake on both of our 06's. I did go put the sticker on anyway though.
In Cali it's required to have a front plate, but some LEO's choose not to pull you over only for that. They may pull you over for speeding and start going down the list and write you for whatever additional violation they can find.
I think Cali exempts smog testing for new cars 4-5 model years. Meaning I could sneak a CAI in until 2011. Don't know if that applies to used HHRS bought in CAli
My main concern will be that my side pipes are too far forward!


