I have the Needs Wings single CAI. Just for grins I removed it and did some 1/4 mile runs with the stock intake that happens to have new K & N drop ins. My corrected times were .2 slower and my top speed was 2 mph less. I feel that many of the intakes on the market are just snake oil noise makers. However thinking that the stock intake is the very best performing unit available ignores the noise,BS requirements made by the government.