Kits are designed for 1980-97 Ford Trucks 5.0L/5.8L with 50-oz. counterbalance. They include an 11'' Dual Friction clutch kit, 50-oz. balance flywheel, throw-out bearing and installation tool. The flywheels are SFI approved. The Dual Friction clutch has 90% more holding power over stock but retains the factory clutch pedal pressure.