Spec Clutch SB26A Billet Aluminum Flywheel SFI Certified

The Spec Clutch SB26A is a billet aluminum performance flywheel engineered to reduce rotating mass, sharpen throttle response, and optimize clutch performance for high-performance street and racing applications. Constructed from aircraft-quality tempered aluminum — either 6061-T6 or 2024-T3 — the SB26A delivers the ultimate combination of strength and lightweight design.

A key differentiator for all SPEC flywheels is the industry-leading CNC machining tolerance of .001 inch — ten times more precise than the industry standard of .010 inch. This level of precision ensures perfect rotational balance, eliminates harmful dimensional runout, and produces a perfectly flat friction surface for optimal clutch disc bedding.

Key Features:

• Aircraft-quality billet aluminum construction (6061-T6 or 2024-T3) for maximum strength-to-weight ratio
• CNC machined to an industry-leading .001 inch tolerance for perfect balance and zero runout
• SFI certified for competitive and high-stress racing environments
• Rebuildable design with a replaceable 1/4-inch thick 1050 high-carbon alloy steel friction plate for long service life
• Compatible with a wide range of friction disc materials, including iron
• Friction plate secured with aerospace-grade fasteners or stainless steel rivets for exceptional strength and corrosion resistance
• Heat-treated, pressed-on ring gear secured with Grade 10 fasteners for durability and longevity
• Optimized moment of inertia (MOI) to maximize engine output and acceleration

The replaceable steel friction plate is formulated specifically for optimum clutch bedding and holding power, making the SB26A a cost-effective long-term solution for performance builds. This flywheel is recommended for highly modified street vehicles and racing applications where reduced rotating mass is critical, delivering faster engine revs and more responsive power delivery without sacrificing reliability.

All SPEC flywheels are designed, tested, and manufactured in-house in the USA, ensuring every component meets the same exacting standards and works in perfect harmony with SPEC clutch kits.