• ACT Mod Twin 225 HD Street Clutch Kit | Subaru WRX STI (04-21) (T1S-S05)
  • ACT Mod Twin 225 HD Street Clutch Kit | Subaru WRX STI (04-21) (T1S-S05)
  • ACT Mod Twin 225 HD Street Clutch Kit | Subaru WRX STI (04-21) (T1S-S05)
  • ACT Mod Twin 225 HD Street Clutch Kit | Subaru WRX STI (04-21) (T1S-S05)
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ACT Mod Twin 225 HD Street Clutch Kit | Subaru WRX STI (04-21) (T1S-S05)

ACT Mod Twin 225 HD Street Clutch Kit | Subaru WRX STI (04-21) (T1S-S05)

T1S-S05

In stock

$1,984.00 USD
$2,449.00 USD $1,984.00 USD
kADDITIONAL DISCOUNTS APPLIED AT CHECKOUT Sold out

The ACT Mod Twin 225 HD Street Clutch Kit for Subaru WRX STI (04-21) is a high-performance twin-disc clutch system designed to enhance durability and heat capacity for demanding driving conditions. Featuring sprung organic discs and a proprietary Positive Lift Floater System, this kit provides twice the surface area of traditional single-disc setups, resulting in improved wear resistance and longer lifespan. The use of a four-stage heat-treating process on all diaphragms ensures consistent strength and reliability under high-stress conditions. This clutch kit is engineered to deliver smooth engagement, reduced chatter, and increased torque capacity, making it suitable for spirited street driving and moderate track use.

Designed specifically for 2004 to 2021 Subaru WRX STI models, this clutch kit is a direct replacement for the stock unit, offering an upgrade in performance without sacrificing drivability. It is compatible with stock flywheels and requires no additional modifications for installation. The kit includes the twin organic clutch discs, pressure plate, and necessary hardware, providing a comprehensive solution for clutch replacement or upgrade. Ideal for enthusiasts seeking improved clutch life, heat management, and consistent performance, this ACT twin disc system is well-suited for daily driving, spirited street use, and light track days.

Overview

ACT Clutch

Part #: T1S-S05

Overview

The ACT Mod Twin 225 HD Street Clutch Kit is designed for Subaru WRX STI models from 2004 to 2021. This high-performance clutch kit features a twin-disc design with sprung hubs and organic friction discs, offering enhanced durability and heat capacity for spirited street driving and occasional track use. It is ideal for enthusiasts seeking a reliable, long-lasting clutch that maintains smooth engagement and improved response under demanding conditions. Whether you're upgrading for better grip or increased longevity, this kit provides a significant upgrade over stock components, supporting your vehicle’s performance and daily usability.

Key Features

Designed with durability and performance in mind, the ACT Mod Twin 225 HD Street Clutch Kit includes multiple advanced features:
  • Twice the disc surface area for improved wear resistance and heat dissipation
  • Proprietary Positive Lift Floater System for quiet operation and no floater rattle
  • Exclusive four-stage heat-treating process on all diaphragms for enhanced strength and longevity
  • Organic friction discs for smooth engagement and reliable performance
  • Sprung hub design to reduce driveline shock and vibration
  • Optimized for street use with occasional spirited driving or light track days

Construction & Design

This clutch kit features a twin-disc configuration with high-quality organic friction materials and a proprietary floater system that ensures quiet, smooth operation. The components are engineered to withstand high heat and stress, making them suitable for demanding driving conditions while maintaining a refined pedal feel.

Driving Feel & Feedback

The clutch provides a firm, predictable engagement with minimal pedal effort, offering excellent feedback for precise control. Its design helps reduce shock transfer to the drivetrain, resulting in a smoother driving experience during both daily commuting and aggressive driving scenarios.

Installation & Fitment

Installation should be performed by a qualified technician familiar with Subaru WRX STI models. Proper alignment and torque specifications are critical to ensure optimal performance and longevity of the clutch components.

What’s Included

The kit includes all necessary clutch discs, pressure plates, release bearings, and hardware required for installation, providing a comprehensive upgrade solution for your vehicle.
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