Are you referring to 73623A? If so, I need your VIN to translate it as there are two part numbers tied to that code for an '05 LGT LTD.
http://img338.imageshack.us/img338/3103/accompressor.jpg
My database shows the same part numbers for 5MT and 5EAT '05 GT front axles.
Originally there were two part numbers for each model (presumably left and right sides) which were 28321AG00A and 28321AG00B. Both were superseded by 28321AG00D.
Hope that helps.
-Rick
Just an fyi guys. I just listed these on our website for easier ordering:
http://www.fredbeansparts.com/servlet/the-3033/Subaru-NGK-Iridium-Spark/Detail
Thanks
Jeremy