There are several brands out there when it comes to aftermarket air intake systems, but Injen leads the way in innovation, efficiency, and power gains. Injen PowerFlow Intake Systems are more than just a high flow air filter on a less restrictive tube. Featuring Injen's patented MR Technology, Injen incorporates a step process into their intake tubes (meaning they increase or decrease the diameter of the intake tube at strategic points to control airflow). This, coupled with the fact that Injen Power Flow Intakes incorporate your existing sensors, mean you won't have any check engine lights and it is safe for use on your vehicle. This "Factory Tuned" design means you won't need any tuning and makes this truly a bolt on system. At the end of the Injen PowerFlow Intake is the Injen High Flow Air Filter Element, which is protected from heat by an aluminum heat shield. The Injen air filter that can be cleaned and reused for as long as you own the vehicle. An air stabilizer and incorporated velocity stack smooth out airflow to help maximize power gains. Comprehensive installation instructions including photos make installation of your new Injen Intake easy enough to do yourself with basic hand tools in under an hour. Everything you need to install this air intake is included. Injen Power Flow Air Intake Systems exceed OE standards and as a result will not void any existing factory warranties that you may have. Additionally, you'll enjoy increased horsepower and torque, as well as improved throttle response. Fuel economy gains, especially during freeway conditions, are commonly achieved helping the unit to pay for itself over time. The part number for this item is PF2018P or PF2018WB (depending on the color) and fits 2000-2004 Toyota Tundra , Sequoia 4.7 models.