Boost performance and boost style with the Mishimoto 2015 Subaru WRX Red Silicone Engine Air Box Hose Kit. Crafted with four layers of silicone and heat-resistant embedded fibers, this kit includes heat and pressure-tolerant upper and lower airbox hoses designed with a smooth internal surface to promote better airflow. The silicone construction is impervious to PCV system particles, outlasting stock hoses and offering superior performance and longevity.