Need 10hp+ but dont want to speend 100's of dollors on Filters and All that stuff, Deck Plate Mod is the Key to reaching your goal. My bro has a taco and he did this mod to his taco and it makes a difference..Sound so nice and so much faster.. Also gives him a better high end torque... heres the site http://www.toyotaoffroad.net/jnburtman/deckplate.html
or this one witch is more informitive www.wattora.com/Mods/deckplate