Modified car in Switzerland

[MattW83]

Hi guys, wonder if anyone can help me with this one? Living in Geneva and just bought a golf R. I would like to change the intake and downpipe but understand that the paperwork can be a nightmare! Does anyone have experience with modifications or can suggest a good source of info? Any help really appreciated!

[MattW83]

Thanks everybody for the info. This is super helpful. So... no buying outside of Switzerland as parts need the Swiss certificate of conformity... and then what is required exactly, a trip over to the testing center where they do the controle technique?

Thanks,

Matt