Pro-M Racing 80mm MAF for Fox Body Mustang 5.0 with EFI, Calibrated for 24lb Injectors. It has been installed and ran for about 10 minutes, with Zero Miles driven. Only selling because I'm going back to the stock style air filter / housing and need a bullet style MAF. The Pro-M 80mm High Flow Mass Air Meter is by far the most popular performance mass air meter ever produced. The Pro-M 80 is molded from high quality polymer and shipped with a washable high flow filter. The Pro-M 80 outflows larger diameter meters by a wide margin due to its bell mouth opening and its innovative sampling design, which eliminates the need for the obstructive sample tube found in all other designs. The Patented 360 Sampling design of the Pro-M 80 makes this meter the finest in the industry. No other meter provides a signal as clean as that of the Pro-M 80. It is, by far, the most accurate meter on the market. The Pro-M 80 is a universal high flow design available in any calibration you choose. It is capable of supporting up to 800 flywheel HP, but is equally well suited to engines making as little as 200 hp. A high flow conical air filter is included (Pro-M 80MM Filter). Plugs into your vehicle's harness connector without modification. All Pro-M Mass Air Meters can be recalibrated, unlike the competition's "disposable" meters.