In most modern automobiles, internal combustion engines BREATHE under-hood air or air ducted from under the front bumper through plastic and rubber tubing. The high operationg temperatures in the engine compartment result in intakeair that is 28 degree or warmer than the ambient temperature and consequently less dense. A hood scoop can provide the engine with cooler, denser outside air, increasing power. At higher road speeds, a properly designed hood scoop can increase the speed and pressure with which air enters the engines intake, creating a resonce supercharging effect. Such effects are typically only felt at very high speeds, making ramair primarily useful for racing, not street performance. To be effective, a functional scoop must be located at a high-pressurearea on the hood. For that reason, some functional scoops are located at the rear of the hood, near the vehicles cowl, where the curvature of the windshield creates such a high-pressure zone, and may be placed so that their opening faces the windshield. The air flow can be easily installed at engine hood or car bumper with double-tape attached on bottom of product. This Air Flow Vent Cover is only a decoration for your car. it can makes your car look amazing new and being improved in grades, just only needs a suitable place to stick with self adhesive function. Note: Please do not wash car expose in rain for 24 hour after the installation.