| ACT engineers XACT flywheels using the latest CAD and Finite Element Analysis (FEA) software to evaluate all design alternatives for the best result possible. |
| ACT demands tight tolerances for fit, concentricity and parallelism so flywheels have an exact fit onto the crankshaft and operate smoothly even at extreme high RPM. |
| Offer excellent heat capacity because they maintain adequate material behind the friction surface. |
| ACT flywheels are lighter, stronger and safer than stock cast flywheels to meet the needs of both enthusiast and hard-core racer. |
| One-piece construction allows fewer opportunities for failure and provides uniform, efficient heat transfer from the clutch disc. No more warped inserts or loose ring gears. |
| Integral ring gear permits more weight reduction where it matters most and eliminates the chance of gear breakage or separation from flywheel. |
| Ring gears are cut with lead-in chamfers for better starter engagement and prevention against rounding off gear teeth. |
| Material is properly distributed for maximum strength, lower inertia, good heat tolerance and rigidity. |
| ACT strategically slots XACT Prolite flywheels to reduce inertia without sacrificing strength and heat dissipation. |
| ACT heat treats the entire forging for strength and toughness, and induction hardens ring gears for longest gear life. |
| All flywheels are CNC-machined and dynamically computer balanced for smooth, high RPM reliability. |
| XACT flywheels are certified as meeting SFI Spec 1.1 |
| XACT flywheels are legal for competition in all racing organizations where SFI certification is required. |
