What is this pulley for on the top passenger side of the cylinder head for? My car doesn't have that and I've seen a few around with it. This is the best picture I could find of one in this ebay ad (the engine bay pic):   http://cgi.ebay.com/ebaymotors/Mitsubishi-Other-Turbo-?cmd=ViewItem&_trkparms=aid%3D111000%26algo%3DREC.CURRENT%26ao%3D1%26asc%3D14%26meid%3D1218923802966685283%26pid%3D100015%26prg%3D1006%26rk%3D1%26&_trksid=p5197.m1992&item=170892732907#v4-41

http://www.pointerpointer.com/

http://i321.photobucket.com/albums/nn376/lanceandjami/bf074397.jpg

LMK if you have a spare and if so how much $$ shipped. Thanks