It has been said many times that the scoop on the srt-10 hoods are not meant to function as a ram air but more a heat extraction point but i dont have one so i dont know. but for something that custom you will be paying regardless of what name.
http://www.ebay.com/itm/Volant-Cold-...ht_3424wt_1398
guys have ran this type of setup which is cheaper
http://www.ebay.com/itm/BCP-03-08-Ra...item1e649e97b5
or you could just run the vararam which is "true" ram air and looks bad ass.
http://www.ebay.com/itm/Vararam-02-0...ht_3940wt_1165