Hi there,
I am the guy that does all our (RPIEngineerings) videos.
Glad my/our videos are of interest to you guys.
We had to put a very very restrictive exhaust on it at Goodwood so if you think it sounds nice on that video with the 5.5, you will really like the sound it makes with the free flowing side exit pipes it runs usually
Believe it or not it was in 4th gear on the dyno so you can see how quickly it spins up in 4th