Spec Clutch SC35A Billet Aluminum Flywheel with Replaceable Friction Plate SFI Certified

The Spec Clutch SC35A is a billet aluminum performance flywheel CNC-machined to an industry-leading .001-inch tolerance — ten times tighter than the industry standard of .010 inches. This exceptional precision delivers a perfectly flat clutch bedding surface and true rotational balance at high RPM, eliminating the vibrations and power losses associated with dimensional runout.

Constructed from aircraft-quality billet aluminum (6061-T6 or 2024-T3), the SC35A is engineered to be approximately half the weight of a comparable stock cast steel flywheel. The reduced rotating mass translates directly into faster engine revving, reduced parasitic drag, and sharper throttle response — advantages that matter in both street performance and competitive racing environments.

Key Features:

• CNC-machined to .001-inch tolerance for perfect balance and a flat clutch seating surface
• Aircraft-quality billet aluminum construction — significantly lighter than OEM cast steel
• Replaceable steel friction plate made from a specially formulated friction-enhancing alloy for optimal clutch bedding and holding power
• Fully rebuildable design for long-term serviceability
• SFI certified for use in competitive and sanctioned racing environments
• Optimized Moment of Inertia (MOI) tuned by SPEC engineers for performance driving applications

The flywheel plays a critical role in clutch performance and drivetrain efficiency. It provides the friction surface for the clutch disc, contributes to rotational inertia that affects power-to-acceleration ratios, and must maintain dimensional integrity at high RPM. The SC35A addresses all three functions with precision engineering and premium materials. Compatible with SPEC clutch kits as well as factory-style clutch assemblies.