997 Turbo Gen 2, do I remap or extend warranty?

[Dogbash]

Hi everyone, had my 997 Turbo Gen2 PDK for a few months now and absolutely love it. I bought the car without a Porsche warranty and having owned it for more than 3 months now I can have the inspection done by Porsche and have a warranty for approx. £2-2.5K (need a genuine Porsche battery fitted).

I've had no problems with the car so far and the only thing I think the car lacks is the exhaust noise. Should I fit an aftermarket exhaust, if so then I'll more than likely get the modifying bug and want a remap. What sort of power can be achieved? Will this screw the gearbox/engine up?

If anyone has any previous experience with this would be good to hear opinions.

Thanks,
Andrew

[Dogbash]

Look as though I'll probably extend the warranty then as its my daily driver and I was hoping to upgrade it to a 991 Turbo S in a couple of years time and if you can't remove trace of the map then it will almost certainly cause problems come trade in/sale.

Andrew