Exhaust Elbow Fits John Deere 4320 Tractor R46473One New Aftermarket Replacement Turbo Exhaust Elbow Fits John Deere 4320 Tractor This aftermarket replacement turbo exhaust elbow is Fits John Deere (Fits JD) 4320 tractor. The elbow is part of the turbocharged exhaust system, routing exhaust gases from the turbocharger outlet and directing them through the exhaust stack. A properly sealing exhaust elbow is essential for maintaining exhaust flow, protecting the turbocharger, and preventing heat and