Why is the Injen CAI listed only for 02-03 altimas?

[Mister_Lizard]

I was looking at purchasing a CAI for my 2005 SER and i had found one on ebay by injen part # RD1979P and it is listed only for 02-03. So my question is will it fit on my car? i didn't think there were very many differences between the years for the 3rd gen Altimas.

The reason im asking is that its currently on sale for about $180, i do know that they have another one that says that it is for 04-06. The sale is only for 1 more day so if anyone could give a quick reply it would be much appreciated.

a not as important question i can probably look up later, How low do the CAI actually sit? would it be recommended to buy the hydro shield/bypass valve?

Thanks