I have a 2004. 5 bone stock except for the new 35" tires. I pull a 14' cargo trailer, about 6,000 lbs daily in town. I would like to add an upgrade or two. What can I do without upgrading the transmission? I am thinking about a box that is adjustable. Possibly something that will allow me to adjust the speedometer. What is reliable. I have a 12v that is built for racing. I just want a little more pep in the 2004. 5
Thanks,
Jeff
Thanks,
Jeff