Kickstart 3.1 ROM chips for the Amiga 4000T. This can also be used on an Amiga 4000D with AmigaOS 3.9 or AmigaOS 3.5. This pack contains genuine Amiga® manufactured v40.70 ROMs part number 391657-01 and v40.70 ROM part number 391658-01. Supplied complete with illustrated installation instructions. These are essential for AmigaOS 3.9 or AmigaOS 3.5.