Nothing complements your new Airaid cold air intake like an official Airaid throttle body spacer. These rather inexpensive bolt-on parts install between your throttle body and intake manifold. The spacer spins incoming which results in a "boost" effect. The higher velocity air results in more power, increased throttle response and even a bump in gas mileage. Airaid's Mustang intake spacers don't look like much but if you want to squeeze every bit of power out of your Stang it is a must have upgrade.