1) If you were worried about heat and its effects on the paint, you WOULD shield both sides..
2) if you were worried about cooling(hood heat transfer) and did not care about paint, you would NOT shield both sides...
3) of course, if you do NOT care about paint, you would not shield either side
4) and if you really cared about cooling the turbo, you would put two Jag vents in the hood!
