It is a type of higher performance disc.
Here is one I have They hold about 25% more torque than an organic type (standard) disc can and they have no spring backing under the fricion material which makes for a more positive release and engaugement, the release is important to Fiero's as there seems to be a lot of people who have clutches that drag making shifting hard. I would really encourgae you to go with a stock pressure plate and one of these discs if you want a little better performance, the price is good and I think you will have much less chance of having clutch problems. These "Puck" type clutches seem to be all made in the same factory, I see about a half dozen names attached to them and they are all identical down to the markings on the rivit heads. Again, do not believe the "5 speed only" on the fitment, it is wrong, they fit every 9 1/8th inch clutch Fiero. Larry
[This message has been edited by trotterlg (edited 08-24-2013).]