SPEC Stage 4 Clutch Kit

2004–2006 Scion xA / xB

ST794

Overview:

The SPEC Stage 4 Clutch Kit is a high-performance clutch solution designed specifically for the 2004 to 2006 Scion xA and xB models. Engineered for enthusiasts seeking enhanced torque capacity and durability, this clutch kit is ideal for drivers pushing their vehicles in demanding conditions such as drag racing, road racing, rally, drifting, and pulling. It offers a significant upgrade over stock clutches, delivering superior clamp pressure and improved engagement characteristics.

Featuring a solid hub design derived from the Stage 3 kit, the Stage 4 clutch assembly is heat treated for increased strength and longevity. This kit is perfect for those who require a robust clutch capable of handling torque loads exceeding 450 ft/lbs while maintaining street drivability in certain configurations.

Key Features:

The SPEC Stage 4 Clutch Kit combines advanced materials and engineering to provide reliable performance and durability. Key features include:

• Solid 8-rivet hub design for enhanced strength and reduced flex
• Heat-treated assembly to withstand high stress and temperature
• Available in 3, 4, or 6 puck configurations to suit different driving styles
• High clamp pressure pressure plate for improved torque transfer
• Carbon-Graphite friction material for consistent engagement and longevity
• High torque sprung hub and disc assembly to reduce drivetrain shock
• Includes bearing and tool kit on select models (please inquire)
• Torque capacity rated at 450+ ft/lbs

Configuration Options

The clutch kit is offered in multiple puck configurations to tailor engagement and drivability:

• 3 puck: Lightest option with aggressive engagement, ideal for racing applications where quick clutch response is critical.
• 4 puck: Balanced option providing a compromise between smoothness and performance, suitable for mixed-use driving.
• 6 puck: Smoothest engagement, street drivable but with a rigid hub that may feel less forgiving in daily driving.

Construction & Design:

The SPEC Stage 4 Clutch Kit is built with durability and performance in mind. The solid hub features an 8-rivet design that minimizes hub flex under high torque loads, enhancing clutch response and reliability. The entire assembly undergoes heat treatment to increase material strength and resistance to wear and heat-induced fatigue.

The friction disc utilizes a Carbon-Graphite material, chosen for its excellent heat dissipation and consistent friction characteristics, ensuring reliable engagement even under extreme conditions. The high clamp pressure plate further improves torque transfer, making this clutch suitable for high-powered builds and aggressive driving styles.

Installation & Fitment:

This clutch kit is designed as a direct fit replacement for 2004–2006 Scion xA and xB models, requiring no major modifications for installation. Professional installation is recommended to ensure proper clutch alignment and engagement. The kit includes necessary components to facilitate installation, and select models come with a bearing and tool kit to assist the process.

What's Included:

• SPEC Stage 4 Clutch Disc (3, 4, or 6 puck configuration)
• High clamp pressure pressure plate
• Solid 8-rivet hub assembly
• Bearing and tool kit (on select models, please inquire)
• Installation instructions

Ideal For:

The SPEC Stage 4 Clutch Kit is ideal for performance enthusiasts and racers who demand a durable, high-torque clutch capable of handling aggressive driving conditions. It is especially suited for:

• Drag racing and straight-line performance
• Road racing and autocross events
• Rally and off-road competition
• Drifting and pulling applications
• Street-driven vehicles requiring a robust clutch upgrade

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.