I live in Belgium. Problem is that a lot of parts have to come with a certificate that says they are approved by tüv/goca. So JDM/USDM exhausts, seats, seat belts and suspension aren't allowed here. Carbon is forbidden by law, so are after market tie bars, lca's, sway bars, front tow hooks, diffusers, tilted wings, lifted hoods, sports mirrors (except M3 style ****), rollcages (rollbar is allowed), engine swaps, turbo on a non-turbo car, etc etc...
It's a real pain in the ass to get my car through the annual inspection. I also have to lift it sky high because we need to have 11,5 cm under clearance.