what is the performance increase from base exhaust to nismo exhaust? How much lighter is the nismo exhaust?

Some people on here say you gain some HP but as far as how much I really don't know. I do know the sound is deeper than a base model exhaust.

Just deeper not louder?

Absolutely fantastic seller. Made the trip up to Columbia and met me in the rain to deliver the exhaust. I cannot wait to get it installed.

Thanks again!