Really? You already provided the testing to verify, "metal absorbs heat rather easily" and increases air temp!
My air intake temp is the same as ambient temp.

 

I've been called worse.
MAGA & Semper Fi.

On a side note:

Cooler air gives you more power because there are more oxygen molecules per square inch of air….meaning the air is denser. Denser air is better because your motor will now ingest more air in a given stroke. Because of this you will notice that the A/F ratio of the motor will become lean due to that fact that your motor is still injecting the same amount of fuel but there is more oxygen present because of the denser air.

 

What are those down pipe spark plug looking things for??? Some people call them O2 sensors........wonder how that works!

 

You can check here:

https://www.rushlimbaugh.com/contact/

 

A CAI should reduce pressure losses to get in more air to the engine. Thats more O2 molecules right? Anyway, on our H3s, the MAF sensor is located at the airbox outlet before the tubing, it will measure the air passing at that point and neglect whatever happens to it afterwards. So more air flow will be registered at the MAF leading to more advance, more power. Also, faster air velocity will reduce pressure = slightly cooler air. I highly doubt at any situation off idle the engine bay temps will heat the intake tube enough to negatively affect the air inside it. At 1800 rpm cruise, a 3.5L will suck in ~ 6 cu m of air a minute. Thats alot of air to pass through a small tube perhaps the heat soak effect will be less than a single degree.
Also, at speed, the engine bay temps drop dramatically. The way the air is vented, air moves in through the radiator, over the engine and gets evacuated down under the block. Now the intake tube is only seeing air thats been heated by the radiator, which then passes over the exhaust manifolds and out from under the oil pan! At max thats 200* of heated air.

 

There is a sense of humor! Appreciate it.........

 

Yeah metal conducts heat, but it cannot conduct that heat to air moving through inside in 1/10TH of a second. Get it?

And stock intake systems are the also within 2-3F from outside air. Been there, recorded 100s of GM test vehicles and all the Hummer models except the H1s.

 

Air is easily manipulated. It only takes "1/10th of a second" @1200rpm, for the air to increase temp to 4500degrees, during combustion.

 

Comparing moving air to combustion????? What next!

 

My point is how fast air temp can change!
You didn't like my example using the heat gun? However within a very short distance a heat gun can intake ambient temp air and emit a stream of hot air, usually at temperatures between 100 °C and 550 °C (200-1000 °F), with some hotter models running around 760 °C (1400 °F), which can be held by hand.
A material that doesn't conduct heat is what I want on my heat gun handle, and cai!
The Volant air intake system discussed here is made from highly durable materials, such as the marine-grade clamps of stainless-steel that are resistant to engine heat and the ducts of molded polyethylene that provide a clear and cool passage of air to the engine.