Trick Flow® TFX™ cold air intake kits replace an engine’s restrictive stock air cleaner or airbox with a black composite, low-restriction unit and reusable cotton-gauze filter that will increase airflow to the engine. And as we all learned in Horsepower 101, more air equals more power. The kits include an air filter assembly, a plenum (where applicable), mounting hardware, and instructions. Manufactured by K&N for Trick Flow