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The test resultsin thelink below show that installing amodified 91 octane tunewith the stock intake adds 10 rwhp(271-261),but that using the same91 octane tunewithseveral differentaftermarket intakes adds anywherefrom 17 to 27.9 rwhp[(278-261) to (288.9-261)]. Thus, one can readily see that the aftermarket intakes addanother 7-17.9 rwhp to the 10 rwhp gained by the tune.
http://www.mustang50magazine.com/tec...ons/index.html