I have a 02 MXZ 600 w/rer. I weight 180lbs. I have 144 1.080 reotin Hornets, and a mbrp race silencer. I'm thinking about opening it up later on. I want to improve mid range alot. Also I don't really want to hurt my gas milage. Probally clutching is the best but I have no idea which is the best setup.