ACT Heavy Duty Race Rigid 4 Puck Clutch Kit Includes Flywheel (SB11-HDR4) | Subaru WRX 2006-2025

The ACT Heavy Duty Race Rigid 4 Puck Clutch Kit Includes Flywheel (SB11‑HDR4) is engineered for 2006–2025 Subaru WRX owners who demand brutal engagement precision, maximum power transfer, and uncompromising performance for motorsports and high‑output builds. This complete kit combines a rigid 4‑puck race‑style clutch disc with a heavy‑duty pressure plate and matched ACT flywheel, delivering lightning‑fast shifts and exceptional torque handling for aggressive applications like drag racing, time attack, and competition driving.

KEY FEATURES

• Rigid 4‑puck clutch disc for direct, positive engagement and ultra‑fast power transfer
• Heavy Duty pressure plate increases clamp load and improves durability under extreme conditions
• Matched lightweight flywheel enhances throttle response and rotational acceleration
• Ceramic friction disc construction provides high heat tolerance and reliable performance
• Complete direct‑fit kit includes clutch disc, pressure plate, flywheel, release bearing, alignment tool, and necessary hardware
• Designed for competitive racing, high‑boost builds, and drivers who want the most aggressive engagement available

TECHNICAL SPECIFICATIONS

• Platform Compatibility: Subaru WRX 2006–2025
• Clutch Type: Heavy Duty Race Rigid 4 Puck Clutch Kit with Flywheel
• Included Components: Rigid 4‑puck clutch disc, heavy duty pressure plate, ACT flywheel, release bearing, pilot bearing, alignment tool
• Torque Capacity: ~574 lb‑ft (verified ACT rating for SB11‑HDR4 configuration)
• Horsepower Support: Up to ~650 HP (approximate based on verified torque capacity)
• Disc Diameter: 9.4 in / 240 mm high‑performance ceramic rigid‑puck disc
• Material: Ceramic friction disc and heavy‑duty pressure plate for heat resistance and strength
• Installation: Direct‑fit replacement using OEM crankshaft and clutch bolt patterns
• Performance Benefit: Instant engagement, aggressive torque transfer, enhanced shift response, and reliable duty under track conditions

VEHICLE FITMENT

• Subaru WRX 2006–2025

ACT delivers proven, data‑driven performance solutions engineered to optimize your Subaru with unmatched precision and reliability.