Anyone Know What car this is ???

[Acura NsX Pilot]

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I saw it on the way to a run and cant figure out what it is

 

[Mirroredshades]

Looks like a Mosler.

Vette chassi, aftermarket light weight body.

 

[Synthesis]

it sorta does, but i don't think it is....
http://www.fast-autos.net/vehicles/Mosler/

 

[Tamoske]

that is hot

 

[NsXMas]

Looks like a variant of the Factory Five GTM kit car.

It looks to be a one-off body kit on top of a racing chassis in the video you took...