FLO~PRO 4" Turbo Down Cat & DPF Delete Exhaust. Only O2 bungs are replaced. Airlines and pyrometer fittings are not required and removed. Connects to factory muffler and tail pipe as well as most DPF Back Systems. FLO~PRO DPF Delete Electronics, H&S XRT tuner or Edge Juice with Attitude Race tuner required for proper operation. For off-road use only!