What is the best exhaust upgrade for a Nissan GT-R?

I've been looking to upgrade the exhaust on my Nissan GT-R and I'm not sure which one to choose. What exhaust upgrade would you recommend for the best performance and sound?

I would highly recommend the HKS Legamax Premium exhaust. It not only adds a deeper and more aggressive tone to your GT-R, but also provides a noticeable increase in horsepower and torque.

In my experience, the Akrapovic exhaust is the best option for a Nissan GT-R. It delivers a unique and deep exhaust note, while also providing a significant weight reduction for improved performance.

I would suggest looking into the Armytrix Valvetronic exhaust system. It offers a wide range of exhaust note options, from a subtle growl to a loud roar, and also has a valve control system for added customization.