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3
DIMENSIONS
Peterbilt Motors Company 3- 35
EXHAUST HEIGHT CALCULATIONS
The exhaust height calculations are provided as a tool to help layout bodies prior to arrival as well as aid in exhaust
configuration selection.
Please work with the local Peterbilt Dealer to request additional information if required.
The overall exhaust height (EH) can be estimated based on the following formula: EH = Y + SPL + (A + B + C + D) / 2
TABLE 3-11. Exhaust Heights
Y = DISTANCE FROM BTM OF FRAME RAIL TO BTM OF STANDPIPE
Exhaust
Location
389-131
389-123, 386,
384, 367, 365
579, 567
587
388 w/ Low
Profile
Alum Hood
SOC Mounted
(Day Cab)
67.2
69.2
70.2
N/A
67.2
SOC Mounted
(Sleeper)
67.2
69.2
67.6
N/A
67.2
BOC Mounted
N/A
70.7
69.2
N/A
68.7
Frame
Mounted
N/A
84.9
86.0
84.9
N/A
Vertical-
Vertical
N/A
ISX/MX=77.3,
ISL=75
ISX/MX=78.3,
ISL=75.7
N/A
N/A
NOTES:
1) For “A” and “C” values, reference the FRAME HEIGHTS section for front or rear suspension height.
2) For “B” and “D” values, reference the tire manufacturer’s website or catalog for static loaded radius (SLR).
3) For Stand Pipe Length (SPL) values, reference the truck sales order.
FIGURE 3-32. Exhaust Height Calculations