SPEC Clutch

2004–2009 Subaru Impreza WRX STI 2.0L Turbo

Part #: SU301

Overview

The SPEC Stage 1 Clutch Kit for the 2004-2009 Subaru WRX STI is designed to deliver reliable, high-performance clutch engagement for enthusiasts who demand more from their vehicle's drivetrain. Whether you're upgrading for improved street driving, spirited canyon runs, or light track use, this clutch kit provides a perfect balance of performance, durability, and smooth operation. Built with high-quality materials and engineered for a direct bolt-on installation, it helps support increased power levels and enhances overall driving experience.

This clutch kit is ideal for drivers seeking a noticeable upgrade over stock components without the harshness or chatter often associated with more aggressive setups. It offers a smooth pedal feel, consistent engagement, and long-lasting performance, making it a popular choice among Subaru owners who want to improve their vehicle's responsiveness and reliability under demanding conditions.

Key Features

SPEC Clutch's Stage 1 Kit features several innovative design elements that set it apart from standard OEM clutches. The high-performance organic lining is molded from carbon kevlar-based material, providing excellent friction characteristics, smooth engagement, and a long service life. This lining is bonded to a steel backing, ensuring strength and stability under high clamp loads and elevated temperatures. The result is a clutch that can handle increased torque and power while maintaining a smooth pedal feel.

• High-performance organic lining with carbon kevlar composition for smooth engagement and durability
• Integrally bonded steel backing for strength and heat resistance
• Sprung hub design (application dependent) with double sprung configuration for reduced driveline shock and chatter
• Heat-treated components for enhanced strength and longevity
• Designed specifically for street and light spirited driving applications
• Direct bolt-on installation with no modifications required
• Supports increased horsepower and torque over factory clutch components

Construction & Design

The SPEC Stage 1 Clutch Kit is meticulously engineered using premium materials to ensure durability and consistent performance. The organic lining's carbon kevlar blend provides excellent friction and wear resistance, while the steel backing offers structural integrity. The clutch's sprung hub design absorbs torsional vibrations, resulting in smoother engagement and reduced driveline shock. Heat-treated components further enhance the clutch's ability to withstand high temperatures generated during spirited driving or frequent stop-and-go traffic.

Installation & Fitment

The SPEC Stage 1 Clutch Kit is a straightforward bolt-on upgrade designed specifically for the 2004-2009 Subaru WRX STI with the 2.0L turbocharged engine. No cutting, drilling, or complex modifications are required for installation. Basic mechanical skills and standard tools are sufficient to complete the swap. It is recommended to inspect and replace the flywheel surface if necessary to ensure optimal clutch performance and longevity.

• Direct replacement for factory clutch components
• No additional modifications needed
• Installation typically requires standard hand tools and basic mechanical knowledge

What's Included

• Clutch disc with organic friction lining
• Pressure plate assembly
• Release bearing
• Alignment tool
• Hardware and instructions

Ideal For

• Subaru WRX STI owners seeking a reliable, high-quality clutch upgrade
• Drivers looking for improved pedal feel and engagement
• Enthusiasts wanting to support increased power levels for street and light track use
• Daily drivers who want a smooth, dependable clutch with long service life