Its not necessary to leave your battery unplugged overnight. All you need to do is disconnect the battery and turn on your lights. This should discharge the entire system in a couple minutes.

Reconnect everything and start it up. Let it idle in the driveway for a couple minutes to let the engine relearn all the new airflow parameters.

I'm very interested in your numbers. Try another test run to get a couple runs and average the new numbers. Faster in the 0-60 is faster....period. Can't argue with that.

By the numbers, highflow intakes and exhausts reduce torque but increase horsepower. Most people don't notice more tire-spinning power, but they get better acceleration for passing on the highway and the engine can hold gears longer in the auto tranny cause there is enough power to hold speed.