i just have an open K&N cone air filter, if you position it well, it wont suck up too much warm air, i found the best place was behind the inlet, i had a temp probe in the filter and messed around finding different spots to locate it, also, saucy little idea i thought of, get a second IAT, and pop it in the hole where the pcv hose would go, instead of the IAT being exposed to heat soak from the throttle body when the engine is hot, it will read the actual air temp, noticed it was a bit peppier, helped quite a bit.
before i got the pipe so i could locate it somewhere else, i plopped the filter right on the throttle body, aye it sucked in hot ish air, but i got all the noise i wanted, the best kind of noise, induction noise!
(off topic...but have you guys noticed that if you say a word enough times, it almost sounds weird? or should i put the bong away......)