What are the best upgrades for a Nissan GT-R?

I just got a Nissan GT-R and I want to make it even better. What upgrades should I invest in for improved performance and appearance?

For improved performance, consider upgrading the exhaust system and adding a cold air intake. These upgrades can increase horsepower and torque, providing a more thrilling driving experience.

To improve appearance, you could invest in a carbon fiber spoiler or a set of aftermarket wheels. These upgrades will give your GT-R a more aggressive and distinctive look.