Why "hood risers" are for ricers and actually hurt the performance of your car.

[Doppelgänger]

Eh, I guess I was being a bit of a smartass. My apologies, Mike.
With that said, I couldn't really see the vents on the side of the hood you referring to. Do you have pics of the underside of the hood where they are located? What I was getting at about some cars having vents like that, is that things like that are generally placed in areas when airflow is smooth and will create a Venturi effect to help extract air from the engine compartment.

As or vents like what Simon posted, placement of extractor vents is very critical to get just right. I really don't know how much R&D goes into hoods intended for the general street car market. While I doubt they hurt anything, how optimal they are is questionable. Vents like that act similar to what the undertray does to airflow under the car.

[quickdodge®]

Do you have pics of the underside of the hood where they are located? What I was getting at about some cars having vents like that, is that things like that are generally placed in areas when airflow is smooth and will create a Venturi effect to help extract air from the engine compartment.

Here are those pics, Mike.

Outside side hood vents...one on each side:



Inside of those same vents...appears to be outlet for hot air:



Hood scoop/vent:



The hood scoop/vent does draw air for the purposes of cabin "comfort."