Warm Air Intake
 

My xB came with a dealer-installed AEM cold air intake. It's obnoxious and noisy, and puts the air filter in the wheelwell.

However, AEM intakes have a bypass valve (in case of water ingestion), so I took it apart at the bypass, and just stuck the filter there, next to the engine.

http://img114.imageshack.us/img114/5929/1003785mw5.jpg

Here's what I removed:
http://img386.imageshack.us/img386/4408/1003786qi0.jpg

Ignore the Texas Chainsaw Massacre poster.
...and the racist-caricature lamp.
...and the ashtray inside a bag full of baking soda (it stinks).

Sorry the pictures are kind of big, I already closed the imageshack tabs. Oops.

Hopefully, I get some results in terms of FE. I desperately need to clean the filter, but I'd have to shell out the princely sum of $8 for the detergent. However, this little mod made my car a good bit quieter, so at least there's that.

Any idea how warm of air your getting now?

No idea, I haven't splurged on a Scangauge yet. Even if it doesn't make an FE difference, I'm very pleased at the change in how the car sounds. It cut down on the shrillness of the 1NZ-FE.