Well mate, honestly I dont think its worth it. The speed the air travels through the pipes means the air temperature isnt really affected by the cars heating. A standard cai is effective and is simple. Some people have taken it further, by going from the bottom of the CAI box with some pipe and taking air from lower down. A fair bit of work, do a search if you want more info on that. Some people have also put aluminium on the bottom of their CAI, but this will only stop the plastic itself heating up, nothing to do with the air temperature. Seriously, unless its for looks, alloys or anything of that nature are not going to make any difference.