It was my first time installing something like this so it took a lot longer than I originally expected. I spent 2 and a half hours on it when normally it'd take 45mins-1hr. I originally wanted to get a test pipe to reduce the drone from the exhaust and it did noticeably reduce a bit of the drone, but it's still annoying and not to the level I want.
Gains:
As for power gains, I'm sure there are some but like most bolt-ons on an n/a car, it's really nothing too signficant. I'm not sensitive enough to feel much of a difference.
Sound:
The exhaust is a Kakimoto n1 and it was loud to begin with but now with the test pipe it's just FUUUUUU loud. It sounds good but now I'm afraid it'd attract too much negative attention (police). Has anyone ever been pulled over/ticketed for an excessively loud exhaust or an exhaust with no cat? Heavy fines?
Here are some clips: The clips were taken from my phone so quality isn't that great.
(The second video is longer than it needs to be - I don't have video editing software to cut it out)
