first of all i am new to forums and i have only owned my golf gti mk4 for a few months... i wanted to know is there a piggyback controller for the standard ecu...i used to have a subaru wrx sti and i had a " uni chip" it was great is there something like this for golfs???? all i can manage to find is places that want me to send them my ecu or go to a complete stan alone system due to bad experiences i dont want that option.. any info would be helpful
p.s. i have the following mods already
ths front mount cooler
aem intake kn filter
2.5 inch exsaust
thanx