Hey I need some help on pipes. I would really like a pipe that stops before the wheel or at it. I have not seen any so I am looking into having a pipe set made. Do I have to have them equal length or will the power commander take care of that? Do I have to worry about back pressure other than torque? Is it okay to do the step up from 1"3/4 to 2 and 2'1/2 or stay at 2'. I know some of you can help. Thanks in advance.