The Torsen is referenced to : Zexel-Gleason Inc. 2 Jetview Drive Rochester , NY 14624 , USA phone: (716) 464-5000 fax: (716) 328-4577 as mentioned in Racecar Engineering special report on racing differential ******************************************** * Hans-Juergen Schneider / hschnei@ibm.net * * 200 Quattro / 90 Coupe Quattro 20V * * Germany * ********************************************