The sound of it is quieter than the Henessey. Outlaw also removed the baffle box above the throttle body or whater that box is that says 6.2 on it.
I get a deeper cab vibration around 2k rpm where the old intake use to do a quick vibration. Its much more of a drone, but sounds like more like the later model mustangs kinda. Its got that vortex whooooop sound to it. (if that makes sense).
Around 3500 rpm its a much deeper sound as well. The Henessey was what I called "dropping a raptor bomb" which sounded like a dirtbikes powerband pretty much all the way to 5500 RPM+. The volant is much quieter above 4k rpm, but I believe louder than stock. Deeper sound to it.
The performance is MUCH MUCH MUCH more uniform though. I got off the 405 and still had the same performance more or less as I did when it was cold under the hood. The Henessey LOSES a lot of power from all the engine heat, and that POS Henessey intake breaks into pieces and gets damaged when you offroad it.
So far the new Volant is a win. Kinda wish the pipe was metal so I had the same sweet raptor bomb making noise I use to have with the Henessey.
I am not sure about HP between the two intakes. The henessey might have more power when its cold under the hood, but thats only for the first 5 minutes of driving the truck until it warms up. Then the power went down. The volant however seems like a few hp less, cause I think the Henessey adds 20hp, I would think the volant adds around ~10hp, but that 10hp is even while the engine is hot, because its a CAI.
I am no expert on how much HP is under the hood, but I have 23k miles with the Henessey so I know it pretty good.
I would say the Volant is a drastically improved version of the stock system with baffles removed, etc. Whereas the Henessey is for street queens that never see dirt.
With the Henessey, the K&N and steel tube (or its aluminum, not sure) really sound sweet, until like I said it heats up under the engine. In summer, in the sand, in 90+ temps, the Henessey loses so much power I pulled over and opened the hood to cool the engine. I am hoping I dont have this issue with the closed CAI.
Also, these Volants from what I hear have amazing filters. So its nice to keep that Henessey dust out of my engine haha