Spec Clutch SB36A Aluminum Flywheel SFI-Certified Billet CNC Lightweight

The Spec Clutch SB36A is a precision-engineered, SFI-certified billet aluminum flywheel designed for high-performance street and racing applications. CNC-machined to an industry-leading .001-inch tolerance—ten times tighter than the industry standard of .010-inch—this flywheel delivers exceptional rotational balance and a perfectly flat clutch disc seating surface, helping extend clutch life and maximizing safety in competitive driving environments.

Key Features:

• Aircraft-quality billet aluminum construction — tempered 6061-T6 or 2024-T3 aluminum for maximum strength at minimal weight
• Replaceable 1/4-inch thick friction plate — 1050 high-carbon alloy steel, specially formulated for optimum clutch bedding and holding power across all friction disc materials
• Rebuildable design — friction plate is secured with aerospace fasteners or stainless steel rivets for long-term durability and serviceability
• SFI 1.1 certified — meets safety standards required for competitive driving and sanctioned motorsports events
• CNC-machined to .001-inch tolerance — eliminates dimensional runout that causes engine-damaging vibrations and robs power
• Optimized Moment of Inertia (MOI) — engineered for specific driving environments to maximize power delivery, acceleration, and drivability
• Heat-treated ring gear — pressed on and secured with grade-10 fasteners for longevity and reliability

The flywheel plays a critical role in clutch performance by providing a consistent friction surface, contributing the correct rotating inertia for the application, and maintaining true balance at all RPMs. The SB36A's lightweight aluminum construction reduces rotating mass compared to cast OEM flywheels, improving throttle response and allowing the engine to rev more freely. Whether used for street performance, drag racing, road racing, drifting, autocross, or rally, this flywheel is engineered to deliver optimal clutch performance and durability. Note: Requires use of a compatible Spec single-disc clutch kit for proper installation and operation.