Spec Clutch SV87A Aluminum Flywheel SFI Certified CNC Billet

The Spec Clutch SV87A is a billet aluminum flywheel CNC-machined to an industry-leading .001" tolerance — ten times tighter than the industry standard of .010". This exceptional precision ensures perfect rotational balance and a perfectly flat bedding surface for the clutch disc, contributing to maximum reliability and safety in demanding performance and competitive racing environments. The SV87A carries SFI certification, making it a trusted choice for sanctioned motorsports use.

Key Features:

• Aircraft-quality billet aluminum construction for a lightweight, high-strength solution
• CNC-machined to .001" tolerance — 10x tighter than the industry standard
• SFI certified for competitive and sanctioned racing environments
• Replaceable steel friction plate made from friction-enhancing steel specially formulated for optimum clutch bedding and holding power
• Rebuildable design — replace the friction surface rather than the entire flywheel
• Zero dimensional runout eliminates engine-damaging vibrations and power-robbing imbalance
• Optimized moment of inertia (MOI) engineered through extensive R&D for maximum performance output

The flywheel is one of the most critical components in the drivetrain, directly influencing clutch performance and longevity through three key functions: providing a consistent friction surface for the clutch disc, managing rotational inertia to optimize the power-to-acceleration ratio, and maintaining true rotational balance at high RPM. Spec Clutch engineers each flywheel's weight and dimensions with purpose — flywheel inertia affects acceleration response based on gear ratio, tire type, vehicle weight, power output, and powerband characteristics.

The SV87A aluminum flywheel delivers a lightweight inertia profile ideal for high-revving performance and racing applications where rapid throttle response and quick rev changes are essential. Spec's aluminum units are fully rebuildable with a replaceable friction plate, extending the service life of the flywheel and reducing long-term ownership costs.