why is this so much smaller but still supports about 550 hp

http://www.ebay.com/itm/181879788011...%3AMEBIDX%3AIT

than this intercooler

http://www.ebay.com/itm/170805189998...%3AMEBIDX%3AIT

is it just a marketing gimmick to say how much hp the intercooler can support?