HPS 27-545R Red Cool Ram Air Intake Kit with Heat Shield (air box Cool ram SRI) Fine-tuned by HPS to deliver dyno proven performance gains +11 Whp horsepower, +17 Ft/lbs torque and improve throttle response; Does NOT require tuning after the install. Red light weight 2.75" mandrel-bent aluminum alloy piping replaces the stock restrictive air box and optimize the air flow Features HPS signature race proven reinforced silicone hoses and industrial grade 100% stainless steel T-bolt clamps. The included world's best K&N High-Flow, Washable/Reusable Air Filter is backed by Million Mile Limited Warranty. Heavy duty powder coated steel heat shield blocks out heat from engine and delivers maximum cooling effect. The included installation instruction has clear pictures and description to guide the installer throughout the whole process. Fits 2015-2017 Subaru WRX 2.0L Turbo. No modification is required. CARB Exempt: No.