Brand: Performance Friction Corporation (PFC)
Fits 1994-98 Mustang and 1993-97 Ford Thunderbird (except 96-97 Sport Package) / Mercury Cougar XR7 (FMSI D600).
83 Compound was the original super-high torque compound. The torque curve rises with heat to handle the most extreme applications. Requires finesse and control. Replaced by 13 Compound.
90 Compound was developed at the same time as 93 Compound, with lower friction. Used by several race driving schools including Bob Bondurant, Derek Daly, and Jim Russell because of its forgiving nature and long life. Replaced by 11 Compound for most applications.