Description
The ACT Mod-Twin 225 Extreme Rigid Race Clutch Kit is designed for high-powered BMW B58 and Toyota GR Supra applications requiring extreme torque capacity, aggressive launches, rapid shifting, and race-focused durability. With a substantial 1,270 ft/lbs of torque capacity, this ACT twin-disc clutch provides 166% more torque capacity than the OE clutch, making it an excellent choice for serious drag, road, and rally racing applications.
The T2R-B02 Mod-Twin 225 XT Rigid Race Kit combines two ceramic friction surfaces with a solid Mono-Drive hub in a lightweight, completely modular design. The heat-treated chrome-moly rigid Mono-Drive hub provides strength and durability while its continuous spline design helps extend transmission input shaft life. The lightweight rigid construction is optimized for quicker shifts and dependable operation under demanding racing conditions.
Puck-style friction plates use high-quality ceramic friction materials to deliver a high coefficient of friction, superior heat capacity, and long clutch life. Each diaphragm spring undergoes ACT's exclusive four-stage heat-treating process to provide consistent performance and light pedal effort.
The ACT Mod-Twin 225 XT Rigid Race clutch includes a CNC-machined and dynamically balanced flywheel, pressure plate cover, diaphragm spring, ceramic friction plates, rigid Mono-Drive hub, floater, patented Monoloc Collar, release bearing, alignment tool, and pilot bearing when required. The Mod-Twin platform is fully rebuildable, and most components can be ordered separately for long-term serviceability.
Fitment
BMW 3.0L Turbo B58 Applications
- 2016–2018 BMW 340i
- 2016–2018 BMW 340i xDrive
- 2017–2018 BMW 440i
- 2017–2018 BMW 440i xDrive
- 2017–2021 BMW M240i
- 2019 BMW 440i
- 2019 BMW 440i xDrive
- 2019 BMW M240i
Toyota GR Supra 3.0L Applications
- 2023 Toyota GR Supra A91-MT Edition
- 2023–2026 Toyota GR Supra Base
- 2023–2026 Toyota GR Supra Premium
- 2023 Toyota GR Supra Special Edition
- 2024 Toyota GR Supra 45th Anniversary Edition
- 2024 Toyota GR Supra Premium 45th Anniversary Edition
- 2024 Toyota GR Supra Special Edition
- 2026 Toyota GR Supra A90 Final Edition
- 2026 Toyota GR Supra MkV Final Edition
Engine: 3.0L L6 gasoline, 2998cc, DOHC
Key Features
- ACT Mod-Twin 225 Extreme Rigid Race Clutch Kit
- Part Number: T2R-B02
- 1,270 ft/lbs torque capacity
- 166% greater torque capacity than OE
- Twin ceramic friction surfaces
- 225 mm / 8.8-inch clutch disc diameter
- Solid rigid chrome-moly Mono-Drive hub
- Xtreme pressure plate
- Puck-style ceramic friction plates
- High coefficient of friction
- Superior heat capacity
- Lightweight rigid construction
- Aggressive launch capability
- Rapid shifting capability
- Predictable aggressive engagement
- Light pedal effort
- Possible start-off judder
- Moderate to increased transmission gear noise
- CNC-machined and dynamically balanced flywheel
- Forged aluminum cover
- Patented Monoloc Collar
- Fully rebuildable modular design
- Designed for Drag, Road, and Rally Racing
- Clamp-load tested, balanced, and SFI certified
Specifications
| Specification | Details |
|---|---|
| Brand | ACT |
| Part Number | T2R-B02 |
| Item Description | ACT Mod-Twin 225 Extreme Rigid Race Clutch Kit |
| Product Weight | 33.1 lbs |
| Torque Capacity | 1,270 ft/lbs |
| Torque Capacity Over OE | 166% |
| Disc Material | Ceramic |
| Clutch Disc Diameter | 8.8 inches / 225 mm |
| Input Shaft Diameter | 1.375 inches |
| Pressure Plate Type | Xtreme |
| Recommended Use | Drag / Road / Rally Racing |
Performance and Durability
Feel: The ACT Mod-Twin 225 XT Rigid Race clutch delivers predictable aggressive engagement, light pedal effort, and rapid shifting. Its rigid hub design may result in start-off judder and moderate to increased transmission gear noise depending on the vehicle and drivetrain configuration.
Life: The forged aluminum cover, rigid chrome-moly Mono-Drive hub, specially treated diaphragm spring, premium ceramic friction materials, and hardened wear points are designed to withstand severe racing conditions and provide long service life.
Quality: ACT combines robust construction, strategic engineering, premium materials, high heat tolerance, and close manufacturing tolerances to deliver maximum performance under demanding racing conditions.
ACT Difference: ACT applies tactical engineering to the Mod-Twin platform to address common compromises found in twin-disc clutch systems. The result is an ultra-durable, customer-serviceable clutch with exceptionally high torque capacity. ACT clutch assemblies are 100% clamp-load tested, balanced, and SFI certified.
Break-In Recommendations
ACT race discs generally require only a few controlled hard slips to properly lap the friction surfaces before normal driving or racing. Avoid overheating the clutch during break-in, as excessive heat can cause friction surfaces to fuse together, create hot spots, or glaze the friction material.
Frequently Asked Questions
Are ACT clutches balanced?
Yes. All ACT clutch assemblies are computer spin-balanced to within 0.25 oz-in to help ensure smooth operation across the entire RPM range. Stock production clutches are typically balanced to within approximately 0.50 oz-in.
Will an ACT clutch increase pedal effort?
ACT pressure plates are specifically designed to handle high-torque applications. Depending on the application, Heavy Duty pressure plates can increase pedal effort by approximately 15–40%, while Xtreme pressure plates can increase pedal effort by approximately 50–80%. The additional clamping force helps provide the torque capacity, durability, and engagement quality required for high-output applications.
Do ACT race clutches require a break-in period?
ACT race discs generally require only a few controlled hard slips to properly lap the friction surfaces before normal driving or racing. Avoid excessive heat during this process.
Are ACT clutches repairable or rebuildable?
The ACT Mod-Twin is designed as a modular and rebuildable clutch system. In some situations, repairs or rebuilding may be possible following inspection of the clutch assembly. Due to the specialized construction and modifications involved, ACT recommends servicing by qualified technicians familiar with Mod-Twin systems rather than a general clutch rebuilder.
How much does the ACT clutch weigh?
The ACT Mod-Twin 225 XT Rigid Race clutch assembly weighs approximately 33.1 lbs and is generally comparable to the weight of a stock OEM clutch assembly.
