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Aluminum flywheels are great for saving weight and getting those revs up quickly, but they have downsides in terms of expansion and durability. Centerforce’s solution was to lighten up a steel flywheel. By removing weight from the outer edge, the flywheel gains much of the benefit found in an aluminum offering. As Centerforce’s Will Baty relayed, “The entire assembly weighs 45.8 pounds, and although the flywheel is made of steel, it has a low-inertia design. We removed 5 pounds of weight from the outer edge of the flywheel, drastically reducing the inertia; allowing the flywheel to have the same inertia as an aluminum flywheel.” While our old dual-friction clutch called for GM torque-to-yield bolts, this one came with high-strength ARP fasteners. You can also spy our shiny new, and correctly sized, roller pilot bearing.