Originally Posted by TeamRX8 (Post 4702671)

It needs louvers to let the hot engine bay air out ....

Originally Posted by derkenblosh (Post 4760911)

... Nope. This item would be best with the exact opposite of what you are thinking. (purely ''couch engineering'' on my end)

Flat keeps things simple, if anything... added louvers would be reversed to draw even more air from under the car into the engine bay (more air through radiator).