What are the top modifications to make to a Nissan 370Z?

I recently bought a Nissan 370Z and I'm looking to make some modifications to improve its performance and appearance. What are some tried and tested modifications that are worth investing in? I am open to both aesthetic and performance enhancements.

One of the best modifications you can make to your Nissan 370Z is to upgrade the exhaust system. Not only will this give your car a more aggressive sound, but it can also improve its overall performance.