Quite an odd question, but you might be surprised to find that the only really "bulletproof" part of a standard car is, in fact, the engine block.
So, our theory is: if you bolt on more turbos to your ride, provided ther're bulletproof, shouldn't your life insurance premiums decline?
Depending on the turbo, the most common material for turbocharger compressor wheels has been aluminium alloys. Other materials, introduced since the 1990s, include titanium alloys, as well as magnesium and stainless steel alloys. Turbocharger turbine wheels must withstand exceptionally high temperatures, especially in gasoline applications, any risk of excessive thermal expansion can end up being a costly exercise if something goes wrong because of it. Therefore the materials used are designed to be as robust and durable as possible.
Youtuber Edwin Sarkissian creates very entertaining firearm related experimental videos. This episode he shoots a twin-scroll turbocharger with different calibre rounds. You'll be very surprised at how durable a turbocharger actually is, and even more so, the compressor wheel.
have a look at the video, and let us know your thoughts and comments bellow...