I'm with Mineral... It appears that my gas isn't lasting as long either -- but it's all my foot. You are correct though -- I have a 99 and the extra hole is filled on mine with a sensor. Nonetheless I could hear the intake very clearly before I installed the exhaust system. Hopefully someone here can let you know if the other brands perform the same.
Extensive testing! Now there's a phrase I will use when I tell my wife I'm going out in the 'stang. She thinks I'm playing but now we know that it is simply quality control!
