The 90 degree bends in the pipe are a BIG issue, and one of the ways ITG have tried to counteract this in their design in by maximising the intake piping diameter all the way up to the MAF (which has to be a defined diameter to give accurate readings: 67mm). Using larger diameter piping means that as the air has more space in which to flow through the corners there is less slowing of the air than with restricted piping.
By using thick silicone piping and a heat shield some of the intake air temps have been lowered slightly, but the lightweight pipework will need reflective taping at some point. I've been looking at the various options on the Agriemach site but feel the gold tape is probably still the best option.
Whilst keeping temps down in the CAI is a good thing, (as is reducing the disruption in the flow path of the incoming air to a minimum as the HKS solution appears to have done very well), I am next going to look at something similar to what is used in Subaru's, and get a spray bar fitted to the IC. I think chilling the intake air in the space MAY have a greater effect than dropping the intake temps through the CAI by a couple of degrees.
....I'm assuming all your post is referring to the imminent ITG and not the Forge Twincooler.
Re the ITG, when you say "chilling the intake air in the space", do you mean in the space in which the ITG foam filter sits? Because if so, this could surely be significantly assisted by the addition of an inlet from the foglight panel via a flexi air hose (an easy mod) which would then blow/deliver cooler (but not artificially cooled) air into that space and additionally feed the ITG foam filter.
This additional air feed from below could possibly assist any type of high flow tubular intake which has an open filter in that 'front-of-battery' area (but obviously not the Forge Twintake). In theory it's virtually the same as those 'lollipop-on-a-stick' intakes which extend the filter cone lower down except that it would no longer have the disadvantages of exposing the cone filter to water ingress nor having a longer pipework route to the MAF.
Am I right in thinking that whatever temperature the air arrives at the turbo at, it will then be heated; But the cooler it arrives, the less heated it continues its journey?
Please someone correct me if I'm barking up the wrong tree.