A lot of us can’t afford the $300 and something dollar factory radios that kubota supplies. Messicks has a kit for $90 plus shipping. But, shopping around on Amazon, I was able to get the radio for $36, the adapter wiring plug that goes into the stock harness for $23, a couple of crimp connectors and you are good to go. All the cab kubotas use the same 9 pin plug so you can put a radio into anyone of them and use the factory wiring. The factory speakers on my machine being a 10 yr old M6040 were dead, so I had to replace those. But, the whole system, including the antenna, is pre-installed on the cab tractors. So, a radio install is simple. Here is the link to my how-to video and the video description has the links for all the parts I used: radio and wiring harness install