What is that big thing on my engine?

Well, I still don’t know why it is there but I would like to stuff it with insulation of some kind. If I could take it off.

@EE, please dont.

@EllyEllis-You have a very expensive new vehicle. Don’t stuff anything under the engine cover and void the warranty. Find something else to waste your worry time over.

Yes it is expensive, but the engine sounds like a Model A Ford It’s embarrassing.