EPROM only for a 91-94(?). You'll need to have your ECU modified to get your oem chip out for replacement. I recommend a ZIF socket.
Label on EPROM says:
NSX CHIP MODEL A
CHECKSUM 25E6AD
$100 shipped (US only).
Label on EPROM says:
NSX CHIP MODEL A
CHECKSUM 25E6AD
$100 shipped (US only).