Exhaust Pipe Fits John Deere 6220 6120 6320 6420 L158904One New Aftermarket Replacement Exhaust Pipe for John Deere 6020 Series Tractors This aftermarket replacement exhaust pipe (also referred to as a silencer pipe or lower exhaust pipe) fits John Deere 6020 Series utility tractors. Positioned in the lower exhaust system, this pipe routes exhaust gases from the manifold connection downward and is a common wear item due to constant exposure to moisture, mud, and field debris. Installation requires clamp