Welcome to GenVibe, Silver_vibe :DI have a K&N Typhoon installed, been 3 weeks so far and not a single CEL or problem to date!!!Here is a pic of it, if you wanted one:I would recommemend the Typhoon over any other CAI (Since you did mention them, ignore the following if you aren't looking at CAIs): Looks better, performance is excellent and much easier to clean/get to the filter! Then again, I am a little biased However, in K&N's own testing they found that there was no worthy gains to get a CAI over a Short-ram, which is the reason why K&N ONLY makes a Short-ram for the Vibe/Matrix. If there were more gains to be had, they would release a kit to turn the short-ram into a CAI, but as they have said, there's no gains so no reason to do it.I'll try to find the place where I found this info at, or I'll email K&N about it. As for a hood-scoop, cooler air entering the engine would always help, but I am not sure how much the gains would be, w/o a ram-air system. I'm currently looking into this as well, I wish I could get the GT-R hood, or at least find someone to make it for me ... that would be totally *****in'
