Just installed the Austin Racing GP1 HiSlung with the de-cat mid pipe. This is what this bike is supposed to sound like.

i had the exact same reaction you did after i did the swap to my car and the full exhaust was on.

Haha. I couldn't hold in the excitement. This video was right after install without the db killer. It was too loud. It hurt my ears at idle. I ended up putting the db killer baffle in. And it's MUCH better on the ears, but still sounds amazing.

Here is before with the Akrapovic slip on and cat. Eww