This model was designed as a car hood decoration and air exhalation which is glued to the hood. I didn't do any air study, this is just (maybe functional) decoration.  

Due to the fact that car hoods aren't completely flat, check if it's possible to mount it on your.

Print it with some more temperature resistant materials (ABS, PC Blend, PCCF, PA11).

Model size is based on sizes of aftermarket parts, which is 280 x 156 x 10 mm. You will need big print pad or to cut it and glue together. …or just scale it.

You don't need supports, however check it before printing.

Designed with canvas (for base) and splain tool in Fusion 360.