To spec AGRA ready fitted on factory the following sales codes are required: 8000 Series: 130G409 or 130G410 - GPS Ready Steering 130U807 - AGRA GPS READY (Harness & Roof bracket) No after market service kit available for JCB. 4000 Series: 130Txxx (regional / spec dependent) or 130T438 - Field Pro Pack (Includes GPS Ready Steering) or GPS ready & Rapid steer 130U407 - AGRA GPS READY (Harness & Roof bracket) JCB after market service kit p/n - 474/00873 - Ordered through JCB Parts & Service 401/D4423 Part Numbers are: 400/P3721 (From JCB to AgraGPS Bridge) 400/Y1426 (ISO Resistor) 400/Y1427 (ISO Resistor) 401/D4423 (From AgraGPS Bridge to Display + Receiver wire Inside Cab) 400/Y1428 (Wire outside Cab to Receiver) 400/Y1431 (wire to Resume switch and switch itself) 401/A7135 (From AgraGPS Bridge 3Pin Connector to Canbus 1)