The Volkswagen Big SF Intake System for the 2010-2014 GTI is constructed of full 3" aluminum tubing, a custom aluminum airbox, and an intake filter. Mandrel bent and powder-coated black, the 3" intake tube and custom airbox look great in the engine bay and increase airflow potential substantially. The reusable filter can be cleaned and re-used for the life of your vehicle! Note: Proper tuning is MANDATORY for this intake!! Use associated +BigSF OTS Maps or have your car tuned by a Certified Protuner