ChrisM
Mostly harmless.
I'm going to be switching to Race Louvers on my hood, which has a good amount of data on their website. I went through some of the studies they did (looks like AJ was a guinea pig, thanks AJ!) and they've got some good data showing added downforce just by using the louvers and nothing else. Should I consider looking at a wing to balance out the louvers, or would the simple spoiler (it is 1" taller than the OEM GT500 spoiler) I have suffice to balance any added front downforce? Race Louvers have three trim levels with increasing effectiveness. My primary consideration is cooling, but don't want to throw everything out of aero whack.