EXCEPT ZR2 & AT4X models. Fits Factory Split Rear Exit Vehicles ONLY. BORLA® system has a Valve Simulator Add Adapter 60706 for Crew Cab with Standard Bed (6' 7") 157" Wheelbase vehicles System features Polyphonic Harmonizer technology. Add Muffler 60679 to attain the S-Type sound level Installation REQUIRES removal of the Factory Valance Tips See below for product Features & Benefits