mate dont listen to everyone that feeds you negative comments about sri's. i have a type s, n just recently did a diy job for an sri. throttle response is about the same, and even if there is a power loss up top due to heat soak, cant tell much, coz theres a noticable increase in torque right throughout the rev range, n the best part of it was, i did everything for $90! its really not as bad as everyone makes it out to be. i was in the same situation as you, deciding injen or sri. ended up sri, as its easier to replace the filter, absolutely no chance of hydrolock, and u cant beat the sound! :P but, in the end its up to you, obviously a cai, has greater benefits than sri, but for daily driving imho, sri isnt bad at all