The cai, don't put the stock system back on, you'll regret it. Mine runs like shit with the stock intake. Just buy some black hose from one of the Big Box Stores, and route it from the lower grill opening under the radiator and back up so that it blows the air in the location of the filter. Mine never gets hot at all. Only warm during the summer months, which even the stock one will do. But, during the winter, my air filter is cold to the touch, even after sitting around in traffic.
And this weekend, planning on doing the two small scoops directly over top the filter.
btw: there are guys with Lightnings that use a gauge set up that allows them to read OBD II parameters, such as the air temperature sensor. Digital readout. They say that no matter what intake is on their truck, stock or CAI, they all get hot while idling. And they all cool down as soon as the vehicle starts moving. There's lots of leaks around and under the hood that allow air into that corner, which is not directly behind the fan. And they all say that on a dyno, the CAI makes more power than the stock EPA silencer intake.