Whisper Lid makes engine slightly cooler?

[ArticRider]

After I installed the Whisper Lid on my 2001 V6 Camaro, I noticed my engine temp reading is slightly lower than before(before, it hit dead center at midpoint, but now it is slightly lower. Is there a reason for this? Also, I don't know if it's just me, but it seems I lose a little gas mileage from the mod. Anybody have any info or testimony on this? Thanks.

[Camaro3.8L]

Well, I know my engine temp is still exactly the same after this mod...maybe something else is causing it? As for the gas mileage, I cant tell you yet, cuz I havent filled up yet since Ive had my lid.

[ArticRider]

Well, I did damage a little plastic piece off of the IAT sensor, but did not damage the sensor it self. Any other ideas?

[RedBird98]

My temp stayed the same, but I picked up about 3 MPG. In the combination driving I do I was getting around 22 MPG, my last 2 tanks have been 25....