I cut up an Integra tube for mine, you can see it in this pic from back when I was fixing the front end accident. I noticed a loud Hissing noise from the MAF and a deeper growl but not much on the power side of things. A little better MPGs but not much. Also not shown in the pic bec it was torn apart I made a baffle/ box to enclose it from engine heat out of aluminum and some foam against the hood. I'll try for some pics later when I re-install it (I'm running the stock airbox bec I just smogged it- damn CA smog- failed me bec the intake had no smog stamp)