Fitment Information Subaru WRX STI / WRX 2.5L Turbo (2008, 2009, 2010, 2011, 2012, 2013, 2014) Note This item cannot be shipped to the states of California, New York, and Maine. Unavailable for pickup. Specs & Features Material: 3" Mandrel-Bent Aluminum Tube Key Benefits: Increases horsepower, torque, and throttle response. Optimized for top-end performance. Cool Air Intake: Relocates filter outside the engine bay for cooler air temperature and better cooling. Convertible Setup: Can switch to a short ram intake if needed. Premium Components: Includes HPS high-temp silicone Coupler, stainless steel t-bolt clamps, and a washable/reusable HPS Performance Air Filter. Durability: Aluminum tubing ensures excellent heat dissipation and long-lasting performance. Simple Installation: Step-by-step manual with pictures, no modifications required. Included in the kit: HPS Performance aluminum intake tube HPS Performance heavy duty heat shield HPS Performance Air Filter (Washable and Reusable). HPS Performance 100% Stainless Steel T-Bolt Clamps HPS Performance High Temperature Reinforced Silicone Couplers Mounting hardware Installation Instruction Product Description HPS Performance 837 Series 2-pieces cold air intake kit (Part # 837-778) for 3rd Gen 2008-2014 Subaru Impreza WRX STI 2.5L Turbo features free-flowing, 3 inch mandrel-bent aluminum tubing and is dyno-proven to deliver an impressive 29.5 horsepower and 27 lb-ft of torque. Experience improved throttle response and quicker acceleration, all while maintaining a safe air-fuel ratio. To maximize performance, the high-flow, washable air filter is strategically relocated outside the engine compartment, drawing in cold air. A heavy duty, powder coated steel heat shield further isolates the filter from engine heat. This bolt-on upgrade replaces your restrictive stock air intake hose and air box with a smoother, two-piece aluminum intake designed for optimal airflow, excellent heat dissipation, and lasting durability. Engineered for reliability even under extreme driving conditions, the kit includes high-temperature resistant silicone hoses and industrial-grade 100% stainless steel T-bolt clamps. Best of all, no tuning or additional modifications are required.