All of our new parts are aftermarket replacements. Compatible with John Deere Tractor(s) 4320, 4430, 4440, 4450, 4455, 4555, 4630, 4640, 4650, 4755, 4840, 4850, 4955.
Discoloration will occur due to a fast startup not allowing the chrome exhaust pipe to warm up slowly thus causing the "bluing". Flared on inlet end to fit turbo. All States Ag Parts Item No.