If I had to venture a guess I would say it's off backpressure created in the aftermarket Tubes. Much like exhaust but the opposite. IE.The air your pulling in the tube has "spooled" (this is partly what I would asume cause SRI to have better pedal response then CAI since they have less volume to fill) to a certian pressure inside the tube, You suddenly or mildly let off the gas and the built up pressure has nowhere to go really so you get the pop when it fights it's way back out the filter? Again this is just a guess as I'm still learning about cars with my EP being the only one I've ever had worth owning.I don't think my AEM CAI has done it yet but I only hae 4500 miles on it so far. Any thoughts guys?
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