Ok i no this has been beat to death a million times. I need help with numbers. I have a 07 w/out a catalic converter. Does that flow as good as a full brock system. I want the CT dual but cant afford it. Im looking at the Alien head full system of just the slipons. I cant seem to find HP #'s for eathier one. I emailed Brocks and they sent me a link that was customers rides. Any help would be awesome.