Okay, I decided to install a TRD air filter (http://www.brandsport.com/trd-00602-17801-011.html) in my xB for 2 reasons. Better fuel mileage and for better protection. Increase in performance never crossed my mind but this little biotch really showed some improvement flying up the on ramp this morning!!!

I'm thinking maybe this thing just needs to breath a little better so I'm thinking of picking up a cold air intake.
Cold Air Intake (http://www.brandsport.com/toy-pts26-52040.html) Is anyone running it?

you got no replys and that sucks! I would also like to know about the air filter and the cold air intake. Did you ever end up getting the cold air intake? I am picking up my xb in a couple of weeks and have puposly left it near stock to save money. We'll see what the future holds.

what is the toyota part number for the air filter? I'm trying to find out how much one is at my dealership