Just bought a used spec clutch from someone and had a question, been searching all over but didnt have any luck...

The Spec clutches have one pressure plate fin, if you will, that's a different color....how come? My first guess is for balancing but I dont see any leading markers on the fly wheel or anywhere else...

The "Support" tab on the Spec Clutch web-site is not working for me....any input will help, thanks!