Spec Clutch SC85A Billet Aluminum Flywheel SFI Certified - 1.1

The Spec Clutch SC85A is a billet aluminum flywheel precision-engineered for high-performance and racing applications. CNC machined to an industry-leading .001-inch tolerance—ten times tighter than the standard .010-inch tolerance—this flywheel delivers exceptional rotational balance and a perfectly flat friction surface for optimum clutch disc engagement. It carries SFI 1.1 certification, making it suitable for competitive and sanctioned racing environments.

Key Features:

• Machined from aircraft-quality billet aluminum for a significant weight reduction versus stock steel flywheels
• CNC manufactured to .001-inch tolerance for perfect balance and zero dimensional runout
• Replaceable steel friction plate specially formulated for optimum clutch bedding and holding power—making this unit fully rebuildable
• 153-tooth ring gear and 12.750-inch diameter for precise fitment
• Diaphragm pressure plate style compatible
• One-piece rear main seal design
• SFI 1.1 certified for sanctioned racing use
• Reduces rotating mass for faster engine revving, quicker throttle response, and improved acceleration

The SC85A aluminum flywheel weighs significantly less than its stock steel counterpart, reducing rotating inertia to allow the engine to rev more freely and respond more quickly to throttle inputs. SPEC engineers develop each flywheel for specific driving environments, optimizing the moment of inertia (MOI) based on factors including gear ratio, vehicle weight, power output, and powerband characteristics. The rebuildable design and replaceable friction plate extend the service life of the unit, making it a cost-effective long-term performance upgrade.