I'm installing a custom muffler setup on my riding mower. Is not hard, and its not expensive. For less then $30.00 I made my exhaust system that makes my rider at least 3 times as quiet. In fact, Now I hear the rear end, and the mechanical churn of the engine instead of the actual exhaust! This set up can be used with twin cylinder engines too. This is part of a series to videos I shot on converting a Riding mower into a "poor man's ATV".