HKS top mount intercooler uses a bar and plate design to give your Subaru Boxxer engine maximum efficiency for higher horsepower. The intercooler is 30% larger then stock and utilizes no hoses for best air flow. Fits stock or aftermarket stock fitting blowoff valves. The intercooler also fits aftermarket strut bars. Great for improved cooling efficiency. For 2002 and up WRX or STI. HKS Intercooler Kits are application specific upgrade kits for factory intercooled turbocharged vehicles. Designed specifically for each application; intercooler width, height, thickness and placement are calculated for maximum efficiency and performance. All necessary silicone hoses, brackets, hardware and fittings are included for a complete bolt-on installation. Most application specific HKS Intercooler systems and upgrade kits are CARB exempt. HKS keeps this item in stock in the states most of the time, but if you need timely delivery, please call your favorite SBR rep before placing an order!