Just finished installing a 1zzfe throttle on my 05 xa. I used an obx spacer as an adapter plate. I took some measurements while I was in there so if you have been wanting to do this and have ?s ask away lol. Here are a few pics.

 

any noticeable difference in power or mpg?

 

I've been driving with it for a few days now's and its great. I don't have access to a dyno and we all know it probably help my max hp by Zippo, but the throttle response in the lower rpms where it felt limp before I get a little better bite when I hammer down now if you know what I mean. As far as mpg I'm running a 2.5" cat, custom 2.5 catback, this mod with my cai and throttle cooler, and a mishimoto 61°c thermostat. I drive 70 miles on back Maine roads daily and I still average 35 mpg.

 

throttle cooler? where did you get the throttle body from? and have you had any problems with CELs yet?