Exhaust Diffusers (Optional)
Due to higher exhaust temperatures created during regeneration and for a short period after regeneration, devices have
been designed to help dissipate the exhaust gases more effectively which reduces the impact of the heat. These exhaust dif-
fusers reduce the temperature of the exhaust gas by diffusing the heat outlets. Diffusers also reduce the risk of extremely
high temperature areas at the point of exhaust. Three different diffusers are available to cover different exhaust applications.
Note:
Exhaust diffusers must not be modified in any way. If an exhaust diffuser must be removed for truck body installation
purposes, the diffuser must be installed exactly as the OEM installation.
W2116210
Fig. 3 Straight Exhaust Stack out of Vertical Back of Cab
Diesel Particulate Filter (DPF) with Diffuser End Vertical and
Top Five inches Perforated
W2006301
Fig. 4 Straight Exhaust Stack Vertical Pipe with Top Outlet Dif-
fuser Box for Compact DPF
W2006300
Fig. 5 Straight Exhaust Stack Vertical Pipe with Side Outlet
Diffuser Box for Compact DPF
W2111351
Fig. 6 The inside edge of the exhaust diffuser (item 1) should
be parallel to the centerline of the truck within 5 degrees.
Miss-alignment of this diffuser could allow exhaust gas to en-
ter the air inlet hood (item 2) during engine operation.
Mack Body Builder Instructions
CHU, CXU, GU, TD, MRU, LR
USA139046859
Date 5.2017
Body Builder; Engine, MP7, MP8, and MP10
Page 24 (43)
All Rights Reserved
