I took a drive this morning and wanted to know what kind of difference my cold air intake made vs. not having one was. My Titan with a Volant (non ram-air) was pulling in constantly 40-42 degress. Then I hopped in my buddies Chevy 6.0 with the Edge programmer and his was pulling in 57-60 degrees. He has a stock air box on his truck. The temperature was 35 degrees outside. I was pretty impressed to actually see the difference in a CAI vs. factory air box. Yeah I know we had two totally different vehicles, but I still think it would be extremely close either way.