Exhaust/Cold Air Intake

I just got back from a deployment. I am looking in to a Cold Air Intake and a Catback Exhaust system. I was wondering if you can point me in the right direction. website to order from and which one to get.
I have a 2004 Alero 2.2L EcoTech. I know an exhaust may not sound good on a 4cyl. I would like to get a cold air intake soon. This is the on ly one I have found at the moment for an Air Intake system.
http://www.globalautoshop.com/access...bile_index.htm (http://www.globalautoshop.com/accessories/automotive/oldsmobile_index.htm)

Thanks for the help,
Dan

http://cgi.ebay.com/ebaymotors/03-04-05-Cavalier-Sunfire-Ecotec-2-2-Air-Intake-NEW_W0QQcmdZViewItemQQcategoryZ38634QQihZ015QQitem Z250122112362QQrdZ1QQsspagenameZWDVW

for your exhaust http://www.pacesetterexhaust.com/headers_detail.php