I added a 3 inch lift and put 305 75 17s on (measures 34 inches) rubbed a little, but if you an pull back the plastic fender wells just a bit it wont, I simply put 2 small holes in the area where it rubbed, then I used a large zip tie to pull them back to any hole I could find. Large zip tie...
Its a totally different truck, The dealer AEM destroyed acceleration and made it all too scary to pull out into traffic!! Since I last wrote on this, I've acquired the "Green Diesel Engineering" replacement ECU, WOW!! is all I can say!! Its better than New!! instant acceleration, no lag, AMAZING...