Dont have any temp gauges to keep track of under hood temps but with normal driving you can see the heat rising out of the vents.
I went with a larger aftermarket grill to allow more flow.
They give you a template and instructions on where to line up the center vent. this only applied to the 'top sheet' of the hood. it sits half an inch from the bottom of the hood scoop.
For the bottom sheet i cut a pilot hole with a sawzall and just traced the top sheet if that make sense. there...
I was selecting P0101 and P0103 but for some reason it wasnt mapping over. so i ununstalled flashpro software and reinstalled it with the updates and BOOM CEL gone