What are some must-have modifications for improving the power and performance of a Nissan GT-R?

I recently purchased a Nissan GT-R and I want to make some modifications to increase its power and performance. What are some modifications that are essential for achieving the best results? I don't want to waste money on unnecessary upgrades.

Adding a cold air intake and a high-flow exhaust system can greatly improve the power and performance of your GT-R. These modifications will increase air flow, resulting in more horsepower and torque.

A tune or remap can also greatly enhance the performance of your GT-R. This involves optimizing the engine's fuel and ignition settings for maximum power and efficiency.

Upgrading the intercooler and installing a boost controller can help increase the boost pressure in your GT-R, resulting in a significant power boost.