I can tell a difference when the rpm's are high but not a lot. I can also tell a difference in my gas tank. It seems to guzzle more gas with the cone on. I bought the cone because I was gonna order the intake from gr8wht but he stopped making them. I dont have the time to build it my self so I just installed it with out the tubing.
Did you take the hood ornament off or did you get it that way? I was thinking of taking mine off today when I was washing it. It looks all "spiderwebbed" ..hundreds of tiny cracks all through it. I don't what caused that, but my bra covers it anyway.