SPEC Flywheel, Steel for 1999 Mustang GT and 1999-2004 Cobra/Mach 1. SPEC flywheels are CNC manufactured at an unheard-of .001 tolerance, in an industry where the standard is .010. This precision process ensures perfect balance and a perfectly flat bedding surface for the clutch disc. Fits an 8- bolt crank & 10-1/2" clutch. This unit is rebuildable and features a replaceable steel friction plate that is made from a friction-enhancing steel metal specially formulated for optimum clutch bedding and holding power. |