i hate the sound of a bov its cool but it would drive me crazy every single day, seems like u have a strong car, good job on the bumper nice choice, but yes u will need a new catback for it, i love the sound of turndowns but im going to switch to a cobra bumper soon, ur motor seems strong if it only has 54k on it unless it was beat but i doubt it was, u could do a hci and have a strong car, i wouldnt go with turbo or blower to much for me, i like n/a, a good suspension and tires is necessary maybe even before the motor work for a good foundation to build the motor