The FMS is one of the most durable out there, I wouldn't change mine until the disc is worn out. BTW mine has a lot more than 12,000 miles without a slip. The King Cobra isn't as durable, it just has a lighter pedal pressure and the Ram is listed as "not for use with slicks" although I think they're just trying to keep lawsuits off their backs.
If your really concerned then just get a CFDF disk and use it with the FMS pressure plate, Ford even reccommends this.
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GT-40 heads (ported, polished, + milled), B303 cam, 1.7rr's, JE pistons, Offy intake, Carter AFB 625cfm carb, Flowtech 1 5/8" shortys, Flowtech X-pipe, MAC Flowpath exhaust, MAC pulleys, 373's, subframes, Eibachs+Tokicos, B&M ripper, FMS Clutch, Zoom Quadrant+cable, 17" CSA Ultra rims, 235/45ZR17 Yokohama AVS S4's, MSD 6A ignition+coil, FMS 9mm wires, Carbed, Naturally Aspirated, and Nasty!
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