I did the same thing and noticed that on the top end of the rpm range, the silicone hose was collapsing, due to it being too long and compressed through the opening at the radiator support. I put a hard pipe in front with just a shorter straight silicone hose. This made a big difference and the top end wasn't falling on it's face anymore.


When I was at the track, I played around a little and my best times was when I removed the hard pipe and filter in front and made it a short ram instead with the filter right before the radiator support. So the picture below actually worked better at the track for some reason. I guess 1 less sharp bend and being shorter helped my car perform better. I would recommend this to everyone with a cai to test this theory out when at the track since you usually have enough time sitting in line in between runs to switch back and forth. It eases the waiting time for sure...