Here is a decent little upgrade.
http://cgi.ebay.com/ebaymotors/USED-HOLSET-3599350-HX25W-TURBO-109_W0QQitemZ330326937212QQcmdZViewItemQQptZMotors_Car_Truck_Parts_Accessories?hash=item4ce9050e7c&_trksid=p4506.c0.m245&_trkparms=72%3A1171|65%3A12|39%3A1|240%3A1318