Not sure exactly what you're asking, but the Torsen is a TOTALLY different diff design to the stock open design. That alone is an improvements aside from the materials and heat treatments used in the Quaife and Torsen.

The Quaife and Torsen are Helical Differentials

2000 SVT Turbo 295hp/269ftlb@12psi #1 for Bendix Brakes Kits! Knuckles rebuilt w/new bearings $55 AUSSIE ENDLINKS $70 Gutted pre-cats $80/set A lack of planning on your part does not constitute an emergency on mine!