Somewhere in these first three months, after already having been thoroughly convinced that K&N is garbage and that most CAIs don't pull in cold air, I put in a real cold air intake that uses a paper filter. I built myself a Windstar cowl intake. This lowers intake temps from a pretty constant 190*F to between 5-60* above ambient air temperature, depending on ground speed and wind direction.
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The hole into the cowl.
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The horn of the air box inside the cowl.
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Later on I wrapped the canister and tube in header tape. This reduced intake temps by 5*F.
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Three years later, I will confidently tell you that there are little to no performance gains here. I have seen intake temps as low as 0*F and I still can't make the long steep highway climb up to the Eisenhower Tunnels any faster than stock. Eventually, I will make good use out of the extra room that removing the factory air box provides.
While we are on the topic, I also put in Bosch 4 port injectors. The only change I noticed was the smoother idle that many others have reported. Mrblaine once suggested that the smoother idle is really the result of having replaced worn o-rings which fixed a vacuum leak on one or more cylinders.