I bought my truck two years ago with the evolution already on it. Until recently I didn't have the cable to update so it has not been updated since I've owned it, and the guy I bought it from had it for two years, and who knows if he ever did. So to make a long story short, I ordered custome tunes, but should I update it before then?
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S&B C.A.I., OBX LT's, Magnaflow 3"-2.5" SIDO 14" Muffler, 3.5x18" tips, Gryphon CS with 89 tow and perf. and 93 perf. tunes