Factory air boxes are always designed well from the manufacturer, however a small panel filter has restriction and limits to it. Stock intakes are also designed to eliminate sound w HERE tuners want more from their turbos. The Agency Power Short Ram Intake kit features 3 inch aluminum piping that has a CNC machined mass air flow sensor mount from 6061 aircraft grade aluminum. Designed on CAD to ensure a proper OEM fit, the intakes fit in place of the factory unit from the throttle body foward. Each intake features a high flow K&N cone filter with front induction which is key on the GT-R;s stock intake system. These intake retain the factory inlets on the front bumper to help draw in a large amount of cool air. Unlike conventional cone filters with a flat front, they will block air flow w HERE the K&N ones draw more air in. The intakes as tested on Agency Power;s demo vehicle using a Mustang all wheel drive dyno made 30 wheel horsepower and greatly improve throttle response and turbo spool up.