This is the perfect Cab LED turn signal/hazard replacement kit for my 4640. The lights, wiring and hardware are great and easy to install. The only issue I ran into was the sheet metal style nuts but they are factory and 37 years old. I replaced all 8 and the John Deere part number is R99350 (SUB R53528). I'm very happy with these lights and how easy they were to install. Thank you Larsen Lights.