My post may seem a little one sided, but I am just trying to keep you from wasting your money and making a big mistake. This is not from personal experience but by reading posts from other people on this site
AEM and DC sports are the exact same company (AEM bought them out a while back). Here are the facts from the AEM website if you need it (2nd paragraph)
http://www.aempower.com/AboutAEM.aspx I think alot of people have the DC header and exhaust with an aem CAI. Even though it is on the AEM website, the product you will be getting is actually the DC sports race header and DC sports exhaust sytem
My opinion is that the DC sports/AEM stuff out now is all garbage and not worth the hassle trying to get the headers and exhaust fixed when it cracks because it ceramic. I heard some horrible stories about the AEM CAI also (people losing steering and CEL). I would go with either an Injen or Fujita intake (either SRI or CAI), any header other than DCRH, and Greddy (quiet) or AJ performance (loud) exhaust
Here's a post from somebody with the AEM CAI
an intake that almost killed me (AEM CAI)
Perhaps somebody with personal experiences can add to this post (either postive or negative comments)