Notes: Exc Cutaway Chassis; If welded Assy, replace all Reqd parts; Reg Duty Muffler; Optional; HD for 22100;From 6-91; Cutaway Chassis; If welded Assy, replace all Reqd parts; Reg Duty Muffler; Optional; HD for 22100;From 6-91; Cutaway Chassis; HD Arc-welded construction, recommended for commercial use; HD Muffler.;Exc Cutaway Chassis; HD Arc-welded construction, recommended for commercial use; HD Muffler.