I've narrowed my decision for an exhaust down to two.

HKS Hiper: 55mm piping/ 96mm tip

Greddy MX: 60mm piping/ 110mm tip

What do you guys think? Which would be the better exhaust performance-wise for my G2, with just bolt-ons? That is really the only question I need an answer for...I'm pretty sure the Hiper adds a little more power and is a little louder which I don't mind.
VOTE VOTE VOTE!!! Thanks guys.

-Mike