Renault Clio
so today i was washing my car and then i saw my neighbour across the streets he owns many cars and he sells them he said he remaps every car he has he said that he can get the files for my 1.4 16v and remap it for free and i said theres no point because it wont get more then 5bhp but again i might do it because its going to be free i was wondering if it will damage my ecu/engine?