I have created a cold air intake on my 07 Altima 3.5se. I took a weapon R intake with the filter heat shield and attached a flexable spectra tubing. Before I did this I just had the intake and no cover on the filter. With my Ultra guuage the intake temps whereer around 119 -124F sitting in traffic. Now the temps avg around 104-106F. Let me know what you guys think. Since i took these pictures I have wrapped the upper intake pipe in heat reflective insullation.
Here is what it looks like underneath.
Front bumper
