I have the stage 2. Only reason i bought it was a place in texas or oklahoma (city muffler and performance i think)... they are on ebay...
I stole it from them. I called for a quote, guy told me 320 shipped and i said stage two, he said ya. Well, i get it in the mail and the invoice said 325, CC bill comes and they charged 425, they finally corrected it after trying to give me a guilt trip. . Check ebay and you might find one for approx 400 shipped.
The stage 2 protects the filter a little bit better and looks nice but I was pist when i tried putting it on and the tube hit an external sensor on my alternator. Anyways, i went down to AFE and they tried fixing it, pretty shotty and i recommened they change the mold and put a dent in the tube---answer, too expensive. I ended up fixing it myself with some trimming but their customer service sucked basically in the end. The factory rubber tube is fine since it is smooth on the inside, go with stage 1 for the money and possibly fitment problem. .