ARC intercoolers are designed to get maximum cooling for turbo charged vehicles. ARC company in Japan has done extensive research and testing to make sure that the intercoolers they make are the most efficient and functional products in the market. The inner structure was designed so that a large volume of air can travel through as free flowing as possible, and the outer fins were pushed backward to make sure all the air can travel to cool down the intercoolers. By cooling the air temperature to the engine, maximum engine horsepower can be achieved by allowing higher boost settings and larger turbo setups.