400?!??! I dont know where you saw that. Even on AEM'S
website they have it for $356.25. Actually 356 on thier website
is still high but you can get it for $269 on the link below. Just
scroll all the way down the page and you'll see it. I can actually
get it from my local dealer for that much.
http://www.i-m-racing.com/rsx.html