ACT Xtreme Race Rigid 4 Puck Clutch Kit Includes Flywheel (SB11-XTR4) | Subaru WRX 2006-2025

The ACT Xtreme Race Rigid 4 Puck Clutch Kit Includes Flywheel (SB11‑XTR4) is engineered for 2006–2025 Subaru WRX owners pursuing uncompromising race‑level clutch performance. This complete kit integrates a rigid 4‑puck race disc with a high‑clamp Xtreme pressure plate and a matched flywheel to deliver explosive engagement, outstanding torque capacity, and quick, precise shifts ideal for drag, time attack, and competitive motorsport applications.

KEY FEATURES

• Rigid 4‑puck clutch disc designed for direct, positive engagement and minimal slip
• High‑clamp ACT Xtreme pressure plate engineered for extreme torque handling and reduced deflection
• Included flywheel reduces rotational mass to improve throttle response and rev transitions
• Complete kit includes clutch disc, pressure plate, flywheel, release bearing, pilot bearing, and alignment tool for direct‑fit installation
• Ceramic friction disc material offers high heat tolerance and consistent performance under demanding conditions
• Recommended for race use only due to aggressive engagement and higher pedal effort

TECHNICAL SPECIFICATIONS

• Platform Compatibility: Subaru WRX 2006–2025
• Clutch Type: Xtreme Race Rigid 4 Puck Clutch Kit with Flywheel
• Included Components: Rigid 4‑puck clutch disc, Xtreme pressure plate, flywheel, release bearing, pilot bearing, alignment tool
• Torque Capacity: ~681 lb‑ft (rated at the crankshaft for SB11‑XTR4 configuration)
• Horsepower Support: Up to ~740 HP (approximate based on verified torque capacity)
• Disc Diameter: 9.4 in / 240 mm ceramic friction disc for high performance grip
• Material: High‑density ceramic friction material with heat‑treated hub for strength
• Flywheel Type: ACT Streetlite lightweight flywheel included
• Performance Benefit: Explosive clutch engagement, improved throttle response, and consistent performance under high‑stress conditions

VEHICLE FITMENT

• Subaru WRX 2006–2025

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