Torsen differential for your 2006-2015 NC Miata.
The factory clutch pack style limited slip differential was great for the street but not quite robust enough for the track, so we went to the best diff people in the business and asked them to design a unit specifically for the track and Spec MX-5 series competition.
Torsens are known for being bullet proof in the NB cars so we had Torsen use that same design and engineer the torque bias ratio to be specific for a race application for the NC.
Lots of on track and diff dyno testing to make sure this design is as bullet proof as the NB units.
This is the only legal aftermarket differential for Spec MX5 competition.