SPEC Lightweight Aluminum Flywheel

2005–2010 Scion tC / 2008–2015 Scion xB (xB2)

ST82A

Overview:

The SPEC Lightweight Aluminum Flywheel ST82A is engineered specifically for the 2005–2010 Scion tC and 2008–2015 Scion xB (xB2) models. Designed for enthusiasts seeking enhanced clutch performance and improved throttle response, this flywheel offers a significant reduction in rotational mass compared to the factory unit. By reducing inertia, it allows the engine to rev more freely and accelerates clutch engagement, making it an ideal upgrade for street performance and competitive driving environments.

Manufactured with precision CNC machining to an industry-leading tolerance of .001 inches, the SPEC flywheel ensures perfect balance and a flawless surface for optimal clutch disc bedding. This attention to detail not only improves drivability but also enhances the longevity and reliability of the clutch system under demanding conditions.

Key Features:

SPEC’s Lightweight Aluminum Flywheel combines advanced manufacturing and thoughtful design to deliver superior performance benefits:

• CNC machined to an ultra-precise .001 inch tolerance for exceptional balance and smooth operation
• Constructed from high-quality aircraft-grade billet aluminum for significant weight reduction
• Provides a friction-enhancing, perfectly flat surface for optimal clutch disc engagement
• Designed to reduce rotational inertia, improving throttle response and acceleration
• Rebuildable design featuring a replaceable steel friction plate for extended service life
• SFI certified for safety and reliability in competitive motorsports applications
• Optimized moment of inertia (MOI) tailored to the specific needs of Scion tC and xB models
• Compatible with SPEC clutch systems and many aftermarket clutch setups

Construction & Design:

The SPEC Lightweight Aluminum Flywheel is crafted from premium aircraft-quality billet aluminum, chosen for its excellent strength-to-weight ratio and durability. The flywheel’s surface is precision-machined to provide a perfectly flat bedding area for the clutch disc, ensuring consistent friction and minimizing wear. This meticulous manufacturing process also eliminates dimensional run-out, preventing engine vibrations and power loss.

SPEC’s engineering team has optimized the flywheel’s weight and inertia characteristics to balance quick engine response with drivability, making it suitable for both spirited street driving and track use. The flywheel’s rebuildable design includes a replaceable steel friction plate, formulated to enhance clutch bedding and holding power while extending the overall lifespan of the assembly.

Installation & Fitment:

This flywheel is a direct fit replacement for the 2005–2010 Scion tC and 2008–2015 Scion xB (xB2) models, designed to work seamlessly with factory and aftermarket clutch components. Installation requires standard clutch replacement procedures and may involve removing the transmission for access. No major modifications are necessary, but professional installation is recommended to ensure proper torque specifications and alignment.

What's Included:

• SPEC Lightweight Aluminum Flywheel (ST82A)
• Replaceable steel friction plate pre-installed
• Installation hardware (if applicable)
• Documentation and installation guidelines

Ideal For:

This flywheel is perfect for Scion tC and xB owners looking to improve clutch performance, reduce engine rotational mass, and enhance throttle response. It is well-suited for enthusiasts who participate in autocross, track days, or spirited street driving, as well as those upgrading their clutch system for better durability and engagement.

SPEC delivers clutches and drivetrain components. With an emphasis on power transfer and drivability, their products help performance cars put power down cleanly—whether you’re upgrading a daily driver, building for track days, or supporting added torque. SPEC is a solid choice when engagement, durability, and consistent performance matter.