1968-1995 Ford Mustang XACT Prolite Flywheel by ACT 600412 is a Prolite flywheel, which is ACT\’s lighter flywheel offering with lowest inertia. Prolite flywheels are designed for best throttle response and acceleration. Prolite flywheels are preferred for road racing or rally racing, and have reduced drivability. Materials are properly distributed for maximum strength, good heat tolerance and rigidity. ACT flywheels are serviceable and can be resurfaced with no need to purchase additional parts. Features Product Weight (lbs.): 14.7 Material: Chromoly Steel Friction Surface Diameter (Inches): 10.5 Friction Surface Diameter (Millimeters): 267 Flywheel Type: Prolite Tooth Quantity: 157 Benefits Feel: Dramatically improved engine response and acceleration, mild to moderate gear rattle Life: Heat-treated forging for strength and toughness, induction-hardened ring gears for maximum life Quality: One-piece construction allows less opportunity for failure and provides uniform efficient heat transfer from the clutch disc. No more warped inserts or loose ring gears Recommended Use: Recommended for race use ACT Difference: Forged, CNC machined and dynamically computer balanced for smooth high RPM reliability Applications 1968-1970 Ford Mustang Base 1970-1973 Ford Mustang Grande 1970-1973 Ford Mustang Mach 1 1973 Ford Mustang Base 1973 Ford Mustang Grande 1973 Ford Mustang Mach 1 1979 Ford Mustang Base 1979 Ford Mustang Ghia 1982 Ford Mustang GL 1982-1995 Ford Mustang GT 1984-1993 Ford Mustang LX 1993 Ford Mustang SVT Cobra R 1993-1995 Ford Mustang SVT Cobra What\’s In The Box? 1 – Flywheel Warranty ACT\’s Standard 1-Year Limited Warranty