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These sintered metallic clutch discs fit the Tilton OT-II, AP F3, and Quarter Master 7 1/4" racing clutches. The 29mm x 21 spline can be found on some Toyotas, including 1979-86 Supra and 71-84 Celica. (Later Supras used a 30.8mm x 14 spline size.) Set of 2 discs.
Tilton's minimum recommended clutch disc thickness is 0.074" in single-disc clutches or 0.089" on dual disc clutches. New clutch discs measure 0.104" thick.