I just installed the Steeda carbon fiber CAI, which includes their GT high-flow air kit and their new carbon fiber inlet pipe. This intake system replaces my C & L TrueFlow inlet pipe, K & N filter, stock air box, and shortened air silencer. There was a noticable improvement in acceleration. The car seems quicker and more responsive. I'm guessing that I probably gained 10 rwhp over the previous system. I attribute the SOTP gains to three factors. First, the Steeda air filter is twice as big as the stock-size K & N filter. Second, the carbon fiber inlet pipe is straight, unlike the C & L pipe that has bends in it. Third, while the C & L pipe is metal, the Steeda pipe is carbon fiber (plastic-like material) that stays cooler.