ACT Heavy Duty Performance Street Sprung Clutch Kit Subaru WRX 2006-2026 | SB12-HDSS

Product Fitment:

2006-2026 Subaru WRX

The ACT Heavy Duty Performance Street Sprung Clutch Kit is engineered for drivers who demand increased torque capacity without sacrificing street manners. Designed for both performance street driving and track use, this clutch kit delivers a strong, reliable connection while maintaining smooth engagement and manageable pedal effort.

At the core of this kit is ACT’s most popular Heavy Duty pressure plate, featuring an exclusive diaphragm design that significantly increases clamp load while reducing deflection and wear. Each diaphragm undergoes a four-stage heat-treating process, ensuring exceptional durability, consistency, and long-term performance under high load conditions.

Paired with ACT’s Performance Street organic clutch disc, the SB12-HDSS kit offers excellent heat tolerance, smooth engagement, and extended service life. The disc uses premium organic friction material with high copper content for superior heat transfer, along with steel-backed linings for enhanced strength and reliability. A reduced marcel design allows for quicker shifts while minimizing harshness.

This clutch kit is rated to handle 449 ft-lbs of torque, representing a 46% increase over OEM, making it ideal for modified vehicles producing higher power levels while still remaining daily-drivable.

Key Features

• ACT Heavy Duty pressure plate with increased clamp load

• Organic sprung clutch disc for smooth engagement and durability

• Exclusive diaphragm design reduces deflection and extends clutch life

• Four-stage heat-treated diaphragm for consistent performance

• Precision cover stampings for rigidity and balance

• Reduced marcel disc design for faster, smoother shifts

• 100% clamp load tested and dynamically computer balanced

• Designed for high RPM reliability

Specifications

• Item Description: ACT Heavy Duty Performance Street Sprung Clutch Kit

• Torque Capacity: 449 ft-lbs

• Torque Increase Over OE: 46%

• Disc Material: Organic

• Clutch Disc Diameter: 9.4 in (240 mm)

• Input Shaft Diameter: 1 inch

• Pressure Plate Type: Heavy Duty

• Flywheel Type: Prolite

• Product Weight: 24.3 lbs

• Warranty: 12 Months

• UPC: 00842385029494

Driving Characteristics

• Pedal Feel: Light to moderate effort

• Engagement: Smooth and positive

• Noise: OE-like with mild gear rattle possible

Recommended Use

Ideal for street-driven performance vehicles and race applications requiring higher torque capacity, smooth drivability, and long-term reliability.