Oh I'm sorry Eloy, I guess next time I shouldn't say anything.
Gintani will make more power, but at the cost of more sound (some people like this).
AA has the NCC chambers which I'm sure isn't the best for flow while Gintani uses a straight-through design.
I'm sorry if my comment 'cracks' you up but to me as far as power goes between Gintani vs. AA for their muffler it's easy to say Gintani wins. I don't appreciate people mocking me, especially you Eloy I'm very surprised. This isn't a RPi vs. Gintani thread, maybe you forgot?
Also, I got info from powertrip who has had experience with both who clearly said the AA lost serious low end torque, I later confirmed with Alex and them at Gintani who also couldn't believe the low end power loss so it's not like I'm making this stuff out of thin air.