I had a debate with a friend of mine about heat shields around the cone filter(like the Swift intake aluminum wall type). I'm in favor of filter heat shields. What are your opinions?

Does anybody have any mag articles about heat shields?

To settle this debate. (He says THEY ARE A WATSE OF $$$ and nothing but hype!!! He also says, all the hot air from the engine will flow under and out the hood at the cowl... and it's not enough heat left to make a hp/cold air difference on the road because all of the air flowing from outside...)

The Ikon

 

From what i understand, the heat shield keeps the air somewhat cool until it hits the aluminum piping where it heats up