Originally Posted by Mkrantz1106

What was the temp out when you ran your truck that made a huge differance for my truck I had a k&n cai and a flow master muffler with no silencer and went a 15.1 on a 95 degree day then waited for a nice cold day 40 degrees at the beginning of this year and went a 14.3 and I just got a five star tune and was dumb and ran it on a hot day 85 degrees and only went a 14.0 which isn't bad but I'm gonna wait for another cold day before I say that's all it will do cuz it feels much faster with the tune