D Griff
Go Kart Champion
The GTI is by far the easiest car to mod. Most people go pretty much the same route, but tweak a few things to make them a little unique.
I think that's why the GTI is such a popular car. You can do so little and get so much out of it at the same time. I haven't had a single regret since I started modding my car, and I don't think I will. If you're not prepared for some issues, then you shouldn't mod your car
I haven't modded my GTI at all, and one of the reasons is I think the coolest thing about modding is having a unique car. I feel like stock GTIs are more unique than the standard "Carbonio, APR stage 2, etc..." not that there is anything wrong with that, I'm thinking about APR stage one myself. Also, my GTI is my first brand new car and it's just so nice and trouble free as a DD, I really don't want to screw that up!
However, I spent about $5k modding the Civic I had prior to this and didn't regret it at all, I loved that car and enjoyed it for 5 years and spent waay less than I do just making payments on the GTI. I'd say modding is worth iit if you're careful, thoughtful and love the car.