Notes: Before 6-91; Cutaway Chassis; If welded Assy, replace all Reqd parts; Reg Duty Muffler; Optional; HD for 22100;Before 6-91; Cutaway Chassis; HD Muffler; If welded Assy, replace all Reqd parts.
Notes: w/Single Catalytic Converter; If welded Assy, replace all Reqd parts; Reg Duty Muffler; Optional; SoundFX for 22000;If welded Assy, replace all Reqd parts; Reg Duty Muffler; Up to 8500 G.V.W.R; Optional; SoundFX for 22000