The idea behind cold air intake is move the intake lower where air is colder and the colder air contains more air per CC and thus more oxygen. The problem with them is that they are routinely placed in a location that leads to the need for frequent cleaning because of dust and dirt (its lower to the ground and other cars kick up dust and dirt) and they get wet frequently which is not the best for your engine. K&N makes an FPIK which is nice and safe and will still give you an HP boost. Really, you should think of the Supra Turbo MKIII like a rocket ship, as much new age tech was crammed into that tiny shell as possible and back then the tech wasn't as portable as it is now. There really isn't alot of room for a cold air intake. Maybe you could fab one to drop down somewhere but i would be shocked if you could find the space.
If the intake you are seeing on your friends ride isn't lower than it was stock, then the correct term your looking for is Short Ram (or sometimes just Ram) Intake. Bigger tube and filter= more intake air. Hope this helps!
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