This is a set of optional Fioroni 100° Traction Ramps, and are intended for use as a tuning option for the Fioroni Tractive IV differentials.
These traction ramps are the heart of the Tractive IV system. The Tractive IV differentials create their locking action as torque is applied, with the ramps acting as a wedge that locks the gears, and the engine torque being the force that engages the wedge. These plates give you the option to fine tune your Tractive differentials according to your driving style and the racing surface. The angle of the ramp is what determines how aggressive the locking action will be, with steeper ramp angles providing a more aggressive engagement better suited to smooth high traction tracks, and lower ramp angles being less aggressive for bumpy low traction surfaces.
NOTE: From the factory, Fioroni Tractive IV differentials include 120° plates in the front differentials, 80° plates in the center, and 40° plates in the rear.