Just installed this set up today and I'm not sure if anyone else has this set up but I have 2 things I want to ask bec it doesn't sound right to me. The first thing if you rev it or go from 1st to 2nd gear it back fires its not a continuos strong sound. The other thing is right underneath your feet it sounds like its sucking in a lot of air. Not sure if its suppose to spud like that or not. Any help would be great thanks.