A quick search on the forum gives you half the answers, particularly headlights and spoilers both have their own “mega thread”
Etc…
Same with the topic of homologations, you have several threads in “projects” where some of us explain our personal odysseys with homologation and how much the joke cost us, but well, it changes a lot if it’s a spoiler or if you’ve touched the engine, suspension, etc… “Aesthetic” things are generally easier as long as they have a “seal” or are not “important” etc…
Two of the threads where we got a bit more involved with modifications/homologations
