ACT Mod Twin 225 Heavy Duty Rigid Race Twin Disk Clutch Kit (T1R-S07) | Subaru STI 2004-2021

The ACT Mod Twin 225 Heavy Duty Rigid Race Twin Disk Clutch Kit (T1R‑S07) is engineered for 2004–2021 Subaru STI owners who demand serious race‑ready performance and ultra‑strong torque capacity. This premium twin‑disc clutch system combines two 225 mm ceramic friction discs with a rigid hub design and high‑clamp pressure plate, delivering direct engagement, extreme durability, and exceptional power handling in competition and high‑output builds.

KEY FEATURES

• Dual 225 mm ceramic friction discs provide extensive surface contact for maximum torque handling and grip
• Rigid hub design delivers direct, positive engagement with minimal deflection under load
• Heavy duty pressure plate engineered for high clamp load and consistent performance even under extreme heat
• Includes clutch discs, pressure plate, dynamically balanced flywheel, release bearing, pilot bearing, and alignment tool for a full, direct‑fit solution
• Designed for competitive drag, road race, and high‑output performance builds where reliability and repeatability are paramount
• Rebuildable design allows long service life and future upgrades

TECHNICAL SPECIFICATIONS

• Platform Compatibility: Subaru STI 2004–2021
• Clutch Type: Mod Twin 225 Heavy Duty Rigid Race Twin Disk Clutch Kit
• Included Components: Dual ceramic friction discs, heavy duty pressure plate, flywheel, release bearing, pilot bearing, alignment tool
• Torque Capacity: ~800 lb‑ft (verified for T1R‑S07 configuration)
• Horsepower Support: Up to ~860 HP (approximate based on verified torque capacity)
• Disc Diameter: Dual 8.8 in / 225 mm high‑friction ceramic discs for extended torque management and heat tolerance
• Material: Ceramic friction material with heavy‑duty pressure plate and rigid hub components for extreme durability
• Installation: Direct‑fit replacement using OEM crankshaft and clutch bolt patterns
• Performance Benefit: Direct, positive engagement with high torque capacity, improved throttle response, and reliable performance under high load

VEHICLE FITMENT

• Subaru STI 2004–2021

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