Been through a magna 14", flow 40 series, muffler delete, now I just installed true duals with 2 flowmaster 10 series and love it. Getting 21 MPG highway and it sounds amazing. RIght now I have no X or H pipe but am going to hook it up next week, which way should I go? Is it going to do anything to my power band? Next will definitely be headers. I'll post a video tomorrow.