Completed the 2" core install. Here is my opinion.
The install is not that bad. Just give yourself a few hours and don't rush it.
I tried them first without any damping material. I found them to be way too loud for the sound I"m going for.
Next, I installed the baffle material from the stock pipes. This improved the sound greatly in my opinion. The tone got deeper and sounded more controlled. However, it is still slightly too loud for the sound I want.
No doubt many find the sound to be exactly what their looking for but exhaust tone and loudness has got to be one of the most individual preference issues there is.
So, I will be looking for something just slightly more quiet than these.