Is there a performance chip for my 2004 mazda6s?? i found some online but i dont know if they are real. because some people have said there is no such thing as a performance chip for the 6
Try other ways for better performance: exhaust, intake, supercharger.
i was told by a performance shop that they could ship it to California to get re-programmed but the gains are minimal and you would have to use a higher grade of fuel (ie: 91 octane).