Do not, I repeat, DO NOT use the Nyko InterCooler for your Xbox 360. There have been a large number of cases where the Nyko InterCooler actually shortens the life of the Xbox 360 rather than lengthen it.
This happens mainly because the Xbox 360 is set to run on a certain amount of power, and the "brick" supplies that amount of power. When the InterCooler is attached, it saps power from the Xbox 360 to work the fans. In response, the Xbox 360's fans do not get the amount of power that they need to work correctly usually causing the Xbox 360 to overheat. Overheating is the main cause of the infamous 3 red rings of death, the 1 red ring of death, and other fatal problems.
Additionally, some cases report that the plastic from the Nyko InterCooler has melted onto the Xbox 360 console. A few people have even been unlucky enough to have the Nyko InterCooler pull out pins from the motherboard upon removal.
Again, do not, I repeat, DO NOT use the Nyko InterCooler for your Xbox 360.