Most people rotate the maf when you are talking about a supercharged application when the maf is set up for blow through because the way inwhich the air is circulating in the tube .I know I messed with mine because there was a 90 degree angle right before the mass air meets with the intercooler. You need to set up the maf so it reads a good reading of the air passing through it.On a NA set up you don't have to worry about such probs/.If you were wondering how I did it I just turned the mass air top part towards the back of the car but it's located in the fender well. also keep in mind that screen is the reason you might need to change the position of the maf Kyle