Description
The ACT Mod-Twin 225 HD Sprung Street Clutch Kit is engineered for high-horsepower AWD street and street/strip vehicles that demand exceptional torque holding capability without sacrificing drivability. Designed specifically for the legendary Nissan Skyline GT-R R34, this twin-disc clutch system combines outstanding durability, smooth engagement characteristics, and lightweight pedal effort with an impressive 700 ft-lbs torque capacity.
ACT's innovative Mod-Twin design utilizes dual organic friction surfaces and an ultra-durable sprung Mono-Drive hub assembly to maximize torque transfer while minimizing driveline shock and extending transmission input shaft life. The modular, rebuildable design allows for long-term serviceability, making it an ideal solution for enthusiasts seeking reliable performance under demanding conditions.
Each diaphragm spring undergoes ACT's exclusive four-stage heat treatment process to ensure consistent clamp load and comfortable pedal feel. Steel-backed friction plates equipped with premium organic friction materials provide excellent heat management, stable friction characteristics, and extended service life.
Whether your Skyline GT-R is a powerful street machine or a street/strip build, the ACT Mod-Twin 225 HD Sprung Street Clutch Kit delivers exceptional performance, smooth shifting, and long-lasting reliability.
Features
- Twin-disc clutch system designed for high-powered AWD applications
- Rated for up to 700 ft-lbs of torque capacity
- Approximately 74% greater torque capacity compared to OE clutch systems
- Premium organic friction material for excellent drivability
- Soft, progressive engagement characteristics
- Light pedal effort for comfortable street driving
- Smooth shifting performance with OE-like feel
- Steel-backed friction plates for improved durability
- Sprung Mono-Drive hub assembly reduces driveline shock
- Helps extend transmission input shaft life
- CNC-machined and dynamically balanced flywheel included
- Exclusive four-stage heat-treated diaphragm spring
- Modular and fully rebuildable clutch design
- Most replacement components available separately
- SFI 1.2 certified
- 100% clamp-load tested and balanced
- Ideal for street and street/strip use
Included Components
- CNC-machined flywheel
- Pressure plate cover
- Diaphragm spring
- Clutch face
- Puck-style ceramic friction plates
- Sprung Mono-Drive hub assembly
- Floater plate
- Patented Monoloc Collar
- Release bearing
- Alignment tool
- Pilot bearing (when required)
Performance Characteristics
Engagement Feel
- Soft and progressive engagement
- Light pedal effort
- Smooth shifting operation
- OE-level to mild transmission gear noise
Durability
- Forged aluminum cover construction
- Premium friction materials
- Hardened wear points
- Heavy-duty Mono-Drive hub assembly
- Designed to withstand demanding high-performance environments
Quality Engineering
- High heat tolerance
- Precision manufacturing tolerances
- Robust twin-disc design
- Long service life
- Consistent clutch performance under extreme loads
Specifications
| Specification | Details |
|---|---|
| Product | ACT Mod-Twin 225 Heavy Duty Sprung Street Clutch Kit |
| Part Number | T1SS-N04 |
| Torque Capacity | 700 ft-lbs |
| Torque Capacity Increase Over OE | 74% |
| Disc Material | Organic |
| Disc Diameter | 8.8 in (225 mm) |
| Input Shaft Diameter | 1 in |
| Pressure Plate Type | Heavy Duty |
| SFI Certification | 1.2 |
| Product Weight | 29.5 lbs |
| Recommended Use | Street / Street-Strip |
| Warranty | 12 Months |
Vehicle Fitment
Nissan Skyline GT-R R34 (JDM)
- 1999 Nissan Skyline GT-R R34 [JDM] – 2.6L Inline-6 Turbocharged (RB26DETT), AWD
- 2000 Nissan Skyline GT-R R34 [JDM] – 2.6L Inline-6 Turbocharged (RB26DETT), AWD
- 2001 Nissan Skyline GT-R R34 [JDM] – 2.6L Inline-6 Turbocharged (RB26DETT), AWD
- 2002 Nissan Skyline GT-R R34 [JDM] – 2.6L Inline-6 Turbocharged (RB26DETT), AWD
Why Choose ACT Mod-Twin?
ACT's Mod-Twin clutch technology addresses the common compromises found in traditional twin-disc clutch systems by combining exceptional torque capacity, excellent street manners, superior durability, and long-term rebuildability. The result is a customer-serviceable, high-performance clutch package capable of handling serious power while maintaining the smooth engagement and drivability expected from a premium street clutch.
