High cut conversion kit. All the parts that you need to convert your low cut 450X or 430X (SN 18 & Up) to a high cut (XH) mower with Husqvarna OEM parts. This raises the max cutting height to 3.5 inches. The parts included in this kit have individual MSRP's of over $1100. This kit will work for all 450X Automowers. It also works for 430X Automowers with a serial number that starts with 18, 19, 20, or 21. This kit will not work for 2016 and 2017 430X mowers. If you have any questions about if this will work for your 430X Automower please contact us!