ACT Heavy Duty Performance Street Sprung Disc Clutch Kit

Part #: SB10-HDSS

Overview

The ACT Heavy Duty Performance Street Sprung Disc Clutch Kit is designed to enhance the durability and performance of your Subaru WRX STI (04-21). This high-quality clutch kit is ideal for enthusiasts seeking a reliable upgrade that supports spirited driving, daily use, and moderate performance modifications. Engineered with premium materials, it provides a balanced combination of increased holding capacity and smooth engagement, making it suitable for street-driven vehicles that demand both performance and longevity. Whether you're upgrading for improved response or increased load capacity, this clutch kit helps ensure your vehicle maintains optimal power transfer and pedal feel under demanding conditions.

Key Features

This clutch kit features a carefully engineered design focused on durability and consistent performance. Its key features include:

• Heavy-duty sprung disc for smooth engagement and reduced driveline shock
• High-friction ceramic and metallic composite lining for excellent heat resistance
• Robust pressure plate designed to handle increased torque loads
• Precision-machined components for reliable operation and longevity
• Compatible with stock and lightly modified engines for versatile use
• Designed to improve pedal feel and response during aggressive driving
• Constructed with high-quality steel and friction materials for durability

Construction & Design

The clutch features a heavy-duty pressure plate with a reinforced diaphragm spring, ensuring consistent clamping force and durability under high-stress conditions. The sprung disc incorporates a multi-rivet design for enhanced heat dissipation and wear resistance, supporting long-term performance. The materials used are selected for their ability to withstand high temperatures and repetitive engagement cycles, making this kit a reliable choice for daily drivers and enthusiasts alike.

Driving Feel & Feedback

This clutch kit offers a firm yet smooth pedal feel, providing confident engagement and improved feedback during acceleration and shifting. It helps support better power transfer and responsiveness, especially during spirited driving or moderate modifications, without sacrificing everyday drivability.

Installation & Fitment

Installation requires standard clutch replacement procedures, including transmission removal and flywheel inspection. Proper alignment and torque specifications should be followed to ensure optimal performance and longevity. Fitment should be verified against the vehicle's specifications and the part number provided.

What’s Included

The package includes the heavy-duty pressure plate, sprung disc, release bearing, and necessary hardware for installation, providing everything needed for a complete upgrade.