This is a simple, single daughter card that allows you to play Rally X and New Rally X by placing this kit into your z80 socket. This Kit does NOT change the colors for each game [it will use the color proms on your existing pcb] and will use slight varying character sprites in each game. Examples below -
On a Rally X pcb, the left side above is how New Rally X will look for color and slightly different sprites.
On the left side below, this is what the colors look like in game play. Don't like it? Get the full kit with color proms HERE