in the new issue of super street they do an article on the K&N intake for the STi. At the end of it they claim an additional 15 horsepower just by itself. From what ive heard from this forum, just an intake by itself on the Sti will make you lose HP. Which is true? If i can get 15 more HP by adding the K&N i will go ahead and do it (and I wont have to buy a BOV for the sound).