Quote:
Originally Posted by karnov
The Z/28 does not have it, in fact I believe the Z/28 only has a partial part of the hood liner. The purpose of the vent on the 2014 hood is additional downforce. With the cover off the air moved more freely so I am assuming you get more downforce with it off as opposed to having it on? 
I am guessing this is why the Z/28 doesn't have it, so it can have the added downforce. |
The Z/28 absolutely has the hood vent:
And it's more about lift than downforce. Without the vent, underhood air pressure lifts the front end. By providing a way for that pressure to exit, the front of the car lifts less. By adding the giant front splitter, it then produces (some) downforce.