HPS 27-531P Polish Shortram Air Intake Kit (Cool Short Ram SRI with K&N Filter) Fine-tuned by HPS to deliver performance gains, increase horsepower, torque and improve throttle response; Does NOT require tuning after the install. Polish light weight 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. The included installation instruction has clear pictures and description to guide the installer throughout the whole process. Fits 2012-2013 Mazda Mazda3 2.0L Skyactiv. No modification is required. CARB Exempt: No.