xClutch 9in Twin Sprung Organic Clutch Kit Subaru STI 2004-2021 | XKSU23623-2A

Vehicle Fitment:

• 2015–2021 Subaru WRX STI (6-Speed Manual Only)

Take your drivetrain to the next level with the XClutch Stage 4 Twin Disc Sprung Organic Clutch Kit (XKSU23623-2A), engineered specifically for 2004–2021 Subaru STI 6-speed applications. This advanced clutch system is built for high-horsepower street vehicles that demand extreme torque capacity without sacrificing drivability.

The XClutch 9-inch twin organic disc system increases torque capacity by utilizing dual friction surfaces while maintaining smooth engagement through its sprung hub design. This allows for excellent modulation and street-friendly operation—making it ideal for powerful builds that are still driven daily.

Paired with a chromoly lightweight flywheel, this kit improves throttle response and reduces rotational mass, while the hydraulic release bearing (HRB) upgrade enhances clutch feel and consistency. Designed and tested for durability and performance, this system delivers a perfect balance of strength and usability.

Key Features:

• Stage 4 twin-disc sprung organic clutch system
• Designed for high horsepower street applications
• Smooth engagement with excellent modulation
• Includes chromoly lightweight flywheel
• Includes hydraulic release bearing (HRB)
• Increased torque capacity over single-disc setups
• Engineered for durability and consistent performance

CLUTCH KIT SPECIFICATIONS:

• Recommended Use: High Power Street Use
• Clamping Force Increase: N/A
• Torque Capacity (with safety factor): 740 ft-lbs
• Clutch Disc Diameter: 9 1/16 inch
• Disc Material: Organic
• Disc Hub Type: Sprung
• Flywheel Step: +0.150 inch
• Input Shaft Diameter: 1 inch
• Input Shaft Spline Count: 24

Performance Benefits:

• Handles high torque and horsepower builds with ease
• Maintains smooth, street-friendly engagement
• Improved throttle response from lightweight flywheel
• Enhanced drivability compared to aggressive puck-style clutches
• Consistent performance under demanding conditions

Part Details:

• Part Number: XKSU23623-2A
• Stage: Stage 4
• Clutch Type: Twin Disc (Sprung Organic)
• Flywheel Included: Yes (Chromoly)
• Release Bearing: Yes (Hydraulic)
• Transmission Compatibility: 6-Speed Manual Only
• Fitment Type: Direct Replacement

Important Notes:

• Suitable for 6-speed transmissions only
• Professional installation strongly recommended
• Clutch break-in required for optimal performance
• Some increase in NVH is normal with performance twin-disc systems