EMP protection for vehicles

I was doing some research and came across the idea that a lightening protector for a car also protects against EMP. Does anyone have any info on this or recommendations on what type works best.

 

Are you talking about a hanging ground like on a truck with a welding rig or something else?

 

A lightning protector? Like parking under a metal roof?
Or you mean like a surge protector?
What makes a lightning protector work on a house won't work on a vehicle.

See:
EMP, The Electromagnetic Pulse