i bought the AEM v2 CAI when it first came out, and yes i paid around $500. you guys should have seen the look on my mom's face when she found out i shelled out around $500 for the CAI. she was so pissed and forbids me to waste anymore money on my car, but i simply can't resist and i'm still buying parts for my car to this day. so far, the most expensive aftermarket part i've bought so far, would be a Greddy Turbo Kit (at around $2400.00). It doesn't even come with a BOV or an intercooler, so i might have to waste an additional $1500-$2000 for those.

anyways, i have complete specs of parts (it's not completely updated yet) i've purchased so far on my sounddomain page.