P40THY

Hi guys, sorry if this has already been posted, but couldn't find anything after a quick search. I have just bought a MK7.5 R DSG and I am looking into a stage 1 map in the near future. I was wondering, if I use a remap box, will VW know that it has been tampered with and void warranty, even if I take the box off for servicing etc? If not is there any that anyone can recommend? Best and safest power gains? Thanks