I'm looking at a differential for my 2004 Saleen and after looking around, I've decided to go with this unit coupled with a 3.73:1 gear set from FRPP. Cheapeast I've found so far has been $600 for the T-2R and $400 for the T-2...has anyone found this cheaper? Anyone have either unit in their car? If so, how do you like it? I see that Saleen used Zexel Torsens in their cars in the past. Who makes the current Maxi-Grip? The 295's on 18x10's out back help, but I really need something more to aid in traction. Thanks...