12/09 4-10Section 4Exhaust & AftertreatmentGENERAL EXHAUST INFORMATIONKenworth will offer two main DPF and SCR exhaust systems on T440/T470 chassis in 2010. A Right Hand Under DPFand SCR system, in which both canisters are located underneath the cab access step, and an Independent DPF and SCRlocated vertically back of cab on stanchion brackets.RH Under DPF and SCR Independent Back of CabThe following images depict the typical exhaust routings for each system, and can be used to determine exhaust routingpaths for systems you choose. Dimensional information can be found in Section 5 of this manual.Body Builders must not modify (including altering, substituting, and relocating) the DPF and SCR canisters. The exhaustpiping after it exits the SCR canister may be modified, however using smaller diameter piping or piping with numerousbends is not recommend as the backpressure requirements of the system may be exceeded.
