Rxmotor Universal Car Fuel Gas Saver Supercharger Turbo Charger Air Intake Fan (RED) This JDM intake fuel saver features "single fan" system which rotates up to maximum Speed of 55,000r/min It is a great accessory for any car which wants to gain up to 3-6 HP with up to 6% better mileage Diameter: 2" Length x 2.5" Inlet / outlet with a Dual Fan As air travels through an intake it bounces around bends and elbows in the hose causing it to slow down pinning air can be less susceptible to these abrupt changes in direction Universal Fitment for Stock , Short Ram Intake or Cold Air Intake system