The Trackspec Motorsports universal hood louvers are the highest quality and best performing hood louvers on the market. These universal hood louvers can be installed on any application to reduce underhood and engine coolant temperatures. These vents will also reduce underhood pressure and hood flutter at high speed. Measurements are inclusive of the outer trim border that is 3/4" wide. Trust when you are buying Trackspec Motorsports Hood Louvers that you are getting the best hood louvers on the market.