I believe so, i've always found reliable so far. Those values are by datasheet or users, either way they're hopefully true. According to the review it's seems the kama flex are the evolution of the slip stream so i believe it should be a bit better.
I don't get the last parte of your reply

Because according to a review i've found they have almost twice the air pressure of the slip stream and if i'm not wrong is the most important value in a cooler's fan. I don't have any of those so i'm just saying what i read on the internet.

first of all thanks for the answer! I've seen those but i also found the kama flex which, according on what i've read, are the newer version; The minimun rpm are 300 instead of 200, but the performance seems to be better. What do you think about those? I've a i5 3570k and i'm a bit concerned about t...

test
Edited and now let's see where it goes

Hi, i recently bought a noctua nh-d14 but unfortunately my mainboard can control only 4 pin fans. I'm using the ulna adaptor but still the noctua fans at constant rpm are too loud (and the air flow too much in idle!!) so i've decided to repleace them with two 120mm or a 120 and a 140mm pwm fans, bot...