hello

I have a Audi RS6 2004 4.2 V8 biturbo and i want to remove the speed limiter (280km/h). I work in a car service and i can do it myself if someone tells me how is done or which software to use.

I also need a chiptuning for my car. Can anyone here do it for me and ill pay ( i need a proffessional tuning and not amateur)


Thanks