What is the best way to upgrade the exhaust on a Nissan GT-R?

I recently purchased a Nissan GT-R and I'm looking to upgrade the exhaust for a better sound and performance. What are some options that you would recommend for this car? Are there any specific brands or types that work better?

I would recommend going with a full titanium exhaust system from Akrapovic or Armytrix. They are known for their high-quality materials and performance gains. You won't regret the upgrade.

If you want a more aggressive sound, you can go with a straight pipe exhaust. However, keep in mind it may not be street legal and could affect emissions.