I am leaning at going with the Edge plug in Hp box,the 40-75 hp model for my 2004,I am not into racing or frying the tires off,just a good towing HP box. If you have this model,how do you like it?How long have you had it installed on your truck?Any mileage gains?Any codes or such useing this edge box?Thanks for any info. coobie 

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