Plz help

Hey guys I was wondering if putting a chip on ur car hurts it... and if this is good http://cgi.ebay.com/ebaymotors/VW-Golf-GTI-ECU-Flasher-Chip-96-97-98-99-00-01-02_W0QQcmdZViewItemQQ_trksidZp1638Q2em118Q2el1247Q QcategoryZ33597QQihZ012QQitemZ220221058344QQrdZ1QQ sspagenameZWD1V
Thank you

Well i don't think so by putting a chip your car would hurt ,so could you give us some more detailed information as to which make and model of the car are you using where have you fixed the chip in your car and how did you fix it so that we will get a history about it to answer your query in detail .