Hi there, yes there is much info on this subject on the site. Just search. I just put in a Takeda SRI over the weekend and it was a fairly easy job. For which one is better, I believe they will both net you about the same HP/Torque gains (~5HP/6LBFT) - 7-10% increase at high end. I'm not sure how noticeable it is (for me it certainly feels a bit faster, but that could be the placebo effect with the noise and anticipated HP gains).I realize this is an old thread but I am trying to choose between an SRI and a CAI for my 08 Hatchback. Right now I'm trying to choose between building a SRI with the Spectre parts or the DC Sports CAI. I can get the DC Sports intake for $110 through a friend. My estimate on the Spectre build is $70. At the moment I'm leaning towards the DC Sports one but thought I'd get the opinions of the community. Thoughts?
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The SRI is easier to install and you don't need to worry about water coming up from deep puddles like you may need to with a CAI. The CAI is a harder install, but also you need to remember when comes time to clean the filter, it will take you longer with a CAI setup than a SRI because it will take longer to get the filter off. Also more bends and longer tubing with a CAI. More bends can equate to longer air movement. However in something like the 1.8L of a Versa, this may not be a noticeable factor.
Otherwise, people love both and I certainly love my SRI. Takes a bit of getting used to with the sound when you punch it, but it's a nice growl sound.
I went with SRI purely on the basis of an easier install and easier to take off the filter for the periodic cleaning/maintenance. If you have any other questions, let us know. Good Luck.