Originally Posted by
theproffesor
Changing out diffs is alot different then changing out a spur. Every other car made now has around 2.0 internal to include your T4.
2.5 is fine, the Evo6 can fit small spurs and there is a lot of room to move the motor. My awesomatix had an I.R of 2.55 and that was fine.
As to the Pro5 a shaft drive Mi5 would be interesting.