SPEC Spec Stage 3 Clutch Kit

Fitment: 2004-2009 Subaru WRX STI

Part #: SU303

Overview

The SPEC Stage 3 Clutch Kit is a high-performance upgrade engineered specifically for Subaru WRX STI models from 2004 to 2009. Designed to support increased power and torque, this clutch kit offers a robust solution for enthusiasts seeking aggressive driving performance combined with reliable street use. Whether you're pushing your vehicle on the track, engaging in spirited street driving, or upgrading for enhanced durability, this clutch kit helps deliver the response and engagement needed for demanding driving conditions. This kit is ideal for drivers who want a clutch that can handle higher horsepower levels while maintaining smooth engagement and durability. It provides a significant upgrade over stock components, supporting aggressive launches and high-RPM shifts without sacrificing daily drivability.

Key Features

This clutch kit features a carefully engineered combination of materials and design to optimize performance and longevity. The components are built to withstand high heat and stress, ensuring consistent engagement under demanding conditions. The kit includes a high-friction clutch disc, pressure plate, and release bearing, all designed to work together seamlessly for a reliable upgrade.

• Heavy-duty ceramic friction material for increased grip and durability
• Stainless steel pressure plate with reinforced diaphragm spring
• Designed for high torque capacity and aggressive driving
• Engineered for smooth engagement and pedal feel
• Built to withstand high temperatures and repeated use
• Compatible with stock or upgraded flywheels

Construction & Design

The clutch components are constructed from high-quality materials, including ceramic friction surfaces and reinforced steel pressure plates, to ensure durability and consistent performance. The design emphasizes heat resistance and engagement stability, making it suitable for high-stress driving scenarios.

Driving Feel & Feedback

This Stage 3 clutch provides a firm pedal feel with a noticeable increase in grip, offering confident engagement during spirited driving. It helps improve throttle response and shift feel, making it ideal for drivers seeking a more engaging driving experience.

Installation & Fitment

Installation should be performed by a qualified technician familiar with high-performance clutch upgrades. Proper break-in procedures are recommended to maximize longevity and performance.

What’s Included

The kit includes a high-friction clutch disc, pressure plate, release bearing, and all necessary hardware for installation.

Ideal For

This clutch kit is perfect for Subaru WRX STI owners looking to enhance their vehicle’s performance for spirited driving, track use, or high-power applications. It is suitable for those who demand durability and aggressive response from their clutch system.