SPEC Stage 3+ Clutch Kit

2004–2009 Subaru Impreza WRX STI 2.0L Turbo

Part #: SU303F

Overview

The SPEC Stage 3+ Clutch Kit is designed for high-performance street and race applications, offering a perfect balance of durability, engagement, and drivability for your Subaru WRX STI. Built to handle increased power levels and aggressive driving styles, this clutch kit is ideal for enthusiasts seeking reliable performance without sacrificing daily usability. Whether you're pushing your vehicle on the track or enjoying spirited driving on the street, the Stage 3+ provides the confidence and control you need.

This clutch kit features a high-quality carbon semi-metallic full-faced friction material that delivers exceptional lifespan, consistent friction characteristics, and smooth engagement. The design ensures improved power transfer and pedal feel, making it suitable for high horsepower builds and demanding driving conditions. The sprung hub (application dependent) reduces driveline shock and enhances comfort during daily driving, while the heat-treated components ensure long-lasting strength and durability under stress.

Key Features

Designed for enthusiasts who demand top-tier performance, the SPEC Stage 3+ Clutch Kit offers several advanced features:

• High-Performance Friction Material: The carbon semi-metallic full-faced disc provides excellent friction coefficient, longevity, and heat resistance, supporting increased horsepower and torque.
• Durable Construction: Heat-treated components, including the pressure plate and hub, ensure maximum strength and resistance to warping or failure during aggressive driving.
• Sprung Hub Design: The application-dependent sprung hub reduces driveline shock and enhances smoothness during engagement, improving daily driving comfort.
• Optimized Engagement: Engineered for a manageable pedal feel, allowing for quick, confident shifts without excessive pedal effort.
• Compatibility: Specifically designed for 2004-2009 Subaru WRX STI models with 2.0L turbocharged engines, ensuring a perfect fit and reliable performance.

Construction & Design

The SPEC Stage 3+ Clutch Kit features a meticulously engineered design that combines high-quality materials and precision manufacturing. The full-faced friction disc utilizes a semi-metallic carbon composite, offering superior heat dissipation and friction stability. The pressure plate is constructed from heat-treated steel, providing robust clamping force and resistance to deformation under high stress. The assembly is built with durability in mind, ensuring consistent performance over thousands of miles of spirited driving or racing.

Installation & Fitment

The SPEC Stage 3+ Clutch Kit is a bolt-on upgrade that directly replaces your factory clutch components. No cutting, drilling, or complex modifications are required for installation. However, due to the increased clamping force and friction material, professional installation is recommended to ensure proper setup and maximum performance. It is advisable to inspect and replace the flywheel if necessary to achieve optimal engagement and longevity.

• Complete clutch kit with pressure plate, friction disc, and release bearing
• Designed for easy installation with OEM flywheel compatibility
• No special tools or modifications required

What's Included

• High-performance pressure plate
• Full-faced carbon semi-metallic friction disc
• Release bearing
• Installation instructions

Ideal For

• High horsepower street and race cars
• Enthusiasts seeking reliable, long-lasting clutch performance
• Drivers pushing their Subaru WRX STI to its limits
• Track day and autocross participants