My car came equipped with an aftermarket chip and I don't know what it is. Can anyone help? Who makes this chip? There is a white sticker on it that says:

M5 M6
87-88

Here are some pics:

http://img114.exs.cx/img114/6272/dsc026564jk.jpg

http://img114.exs.cx/img114/8758/dsc026571ve.jpg http://img114.exs.cx/img114/2316/dsc026601yw.jpg