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 Short Ram Air 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 Injen Air 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 Intake is the Injen High Flow Air Filter Element. The Injen air filter that can be cleaned and reused for as long as you own the vehicle. An incorporated velocity stack smooths out airflow to help maximize power gains. The filter is protected by an aluminum heat shield. Comprehensive installation instructions including photos make installation of your new Injen Intake easy enough to do yourself with basic hand tools in an hour or less. Everything you need to install this air intake is included and the intake comes with a lifetime warranty. Injen 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 Injen SP3087P and it fits 2017 Audi A4 (2.0 Turbo Models).