I indeed have an official "tuning"-document that i have to show at the technical inspection in a couple of years

So they can't do sh*t to me! No one is pulling me over for my exhaust and if they do you can show them the document, i think that will come in handy one day.
Anyway, is it true we have to make an appointment for our first technical inspection if the car is modified? I'm ordering some KW V1's soon, will that cause any problems or if i have the "plaatsingsattest" from the garage who installed it and did the alignment, will i be ok?
Oh, and for latest installed gadgets i finally got my MTEC shift springs installed in combo with a 700 grams Anarchy Motive shift knob! LOVE the shifting now
Grtz