Section 3 Dimensions Step/DPF Box Assembly RH Under Cab – T270/370 Figure 3-17. T270/T370 RH Step/DPF Box Assembly for Use with Vertical Tailpipe (left) or Horizontal Tailpipe (right) [inches (mm)] Horizontal Muffler-Vertical Tailpipe on Cab – T270/370 FIGURE 3-18. T270/370 Vertical Tailpipe on Right Side of Cab [inches (mm)] 3-15 12/11