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this kinda stuff should be regulated.. if ur gunna say it greatly improves anything then you need to be able to offer proof. K&N are the only intake company that i know ho puts out dyno sheets.
Other companies have them like AEM for example http://www.aemintakes.com/dynocharts...-8212_dyno.pdf. You can get a knockoff of this intake for less than $100 and then buy a good filter like the dryflow AEM makes or you can just make your own.