1999-2004 4Runner Tacoma 3.4L Power-Flow Air Intake System (INJPF2055P)Bring new excitement to your 3. 4L V6 engine with the Injen Power Flow air intake system. Engineered to deliver dyno proven power gains, this system replaces restrictive factory components with high flow 6061 T6 aluminum tubing to maximize oxygen induction. The air filter is strategically positioned to draw in cool, dense air while avoiding engine heat soak, resulting in improved throttle response, increased horsepower, and a more aggressive engine