Serious performance enthusiasts can satisfy their need for more air with Granatelli Motorsports replacement MAF sensor. Good for up to 15 hp, this easily installed MAF boasts 47% more airflow than the stock sensor. Housed in an injection-molded body to reduce power robbing heat soak, state-of-the-art electronics are built to improve ignition and injector timing both. Will not affect mileage or drive ability under normal conditions. 50-states legal.