Mostly are you happy with it, and ease of install. What type of air cleaner are you using? any hood clearance issues. I have a 2" raised hood. I was considering a ram jet set up but I don't think it will fit under the hood. From my research so far the xfi seems to be the best bet. ThanksHey Jerry, I run the XFI on a 565 (4.600x4.25). What kind of info were you looking for?