A horizontal muffler for an agricultural vehicle is provided. One agricultural vehicle includes an exhaust system having a muffler configured to direct exhaust out of an engine and to reduce a noise of the exhaust. The agricultural vehicle also includes a steering wheel configured to control steering of the agricultural vehicle. The muffler is disposed forward of the steering wheel relative to a direction of travel of the agricultural vehicle. Moreover, the muffler extends in a substantially horizontal direction such that a flow of the exhaust through the muffler is substantially parallel to a ground surface.