I didn't measure it on a dyno. The intake was done at the same time I did an exhaust to realize the benefits of better airflow in and better airflow out.
What I noticed was:
1. Better throttle response - all vehicles.
2. A slight improvement in MPG. It wasn't a huge gain but in steady state cruising on my 300C SRT8 it was almost 2 mpg on an extended trip compared to the stock system on a similar trip.
3. Increased induction noise - all vehicles.
4. Cooler highway engine temperatures on two vehicles with stock thermostats. On the 300, I also put in a 180 degree tstat and that made a huge difference, down 15 - 18 degrees when cruising at highway speeds.