The RBT 6 speed, is the same gearbox that is used in the Saleen S7..
It offers wider gears, a hand cuff between 1/2 and the remainder of the gearbox.
It is 50 mm longer that a 5DS26.
And is called a RBT 6..
It was also installed in the Shelby Series 1 car..
We have parts to build them..
But...