SPEC Stage 4 Clutch Kit

2008–2014 Scion xD

ST164

Overview:

The SPEC Stage 4 Clutch Kit is engineered for serious enthusiasts and racers who demand maximum strength and durability from their clutch system. Designed specifically for the 2008 to 2014 Scion xD, this kit is a solid hub evolution of the Stage 3 clutch, offering enhanced torque capacity and improved engagement characteristics. It is ideal for drivers who push their vehicles in demanding environments such as drag racing, road racing, rally, and drifting.

With a torque capacity of 400 ft/lbs, the Stage 4 kit provides reliable power transfer and consistent performance under high-stress conditions. Its heat-treated assembly and robust construction ensure long-lasting durability, making it a dependable upgrade for high-performance applications.

Key Features:

The SPEC Stage 4 Clutch Kit combines advanced materials and engineering to deliver superior performance and reliability. Key features include:

• Solid 8-rivet hub design for increased strength and reduced flex
• Heat-treated assembly for enhanced durability and longevity
• Available in 3, 4, or 6 puck configurations to suit different driving styles
• High clamp pressure pressure plate for improved holding power
• Carbon-Graphite friction material for consistent engagement and heat resistance
• High torque sprung hub and disc assembly to reduce drivetrain shock
• Includes bearing and tool kit on select models (please inquire)

Configuration Options

The Stage 4 clutch kit offers multiple puck configurations to tailor engagement and drivability:

• 3 puck: Lightest option with aggressive engagement, ideal for maximum performance and quick shifts
• 4 puck: Balanced option providing a compromise between smoothness and performance
• 6 puck: Smoothest engagement, street drivable but with a rigid hub that may not be ideal for daily driving

Construction & Design:

The SPEC Stage 4 clutch kit features a solid hub design with eight rivets, significantly enhancing the structural integrity compared to previous stages. The entire assembly undergoes heat treatment to increase strength and resistance to wear under extreme conditions. The carbon-graphite friction material is selected for its excellent heat dissipation and consistent friction characteristics, ensuring reliable clutch engagement even during aggressive driving.

The high clamp pressure plate maximizes holding power, while the sprung hub and disc assembly help absorb drivetrain shock, reducing stress on transmission components and improving overall drivability.

Installation & Fitment:

This clutch kit is a direct fit for the 2008–2014 Scion xD and is designed to replace the factory clutch assembly without requiring major modifications. Installation should be performed by a professional or experienced technician to ensure proper setup and adjustment. The kit includes all necessary components for a complete clutch replacement, and select models come with a bearing and tool kit to facilitate installation.

What's Included:

• Stage 4 clutch disc (3, 4, or 6 puck configuration)
• High clamp pressure pressure plate
• Sprung hub and disc assembly
• Bearing and tool kit (on select models, please inquire)

Ideal For:

The SPEC Stage 4 Clutch Kit is perfect for performance enthusiasts and racers who require a durable, high-torque clutch capable of handling aggressive driving conditions. It excels in applications such as drag racing, road racing, rally, pulling, and drifting. While the 6 puck version is street drivable, the rigid hub design makes it less suitable for everyday commuting, making this kit best suited for dedicated performance vehicles.

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.