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Hold substantial N54 and N55 torque while retaining progressive organic disc engagement.
ACT part T1SS-B01 combines a Mod-Twin 225 clutch, sprung hub, and chromoly flywheel for verified BMW 6 speed manual applications.
Key Features
- For T1SS-B01, twin 225 mm organic friction discs for street and street strip use
- 690 ft-lb torque capacity, 125 percent over original equipment
- Heavy Duty pressure plate with forged aluminum cover
- Sprung Mono-Drive hub for reduced driveline shock
- CNC machined chromoly flywheel
- SFI 1.2 certified and fully rebuildable
Fitment
| Years | Make | Model | Transmission |
|---|---|---|---|
| 2009-2013 | BMW | 135i | 6 speed manual |
| 2009-2013 | BMW | 335i and 335i xDrive | 6 speed manual |
| 2011-2013 | BMW | 335is | 6 speed manual |
| 2009-2016 | BMW | 535i and 535i xDrive | 6 speed manual |
| 2009-2016 | BMW | Z4 sDrive35i | 6 speed manual |
| 2014-2016 | BMW | 435i and 435i xDrive | 6 speed manual |
| 2014-2016 | BMW | M235i | 6 speed manual |
Specifications
| Detail | Value |
|---|---|
| Manufacturer Part Number | T1SS-B01 |
| Disc Count | Twin |
| Disc Diameter | 8.8 in / 225 mm |
| Disc Material | Organic |
| Torque Capacity | 690 ft-lb |
| Increase Over OE | 125 percent |
| Input Shaft Diameter | 1.375 in |
| Pressure Plate | Heavy Duty |
| Certification | SFI 1.2 |
| Product Weight | 33.1 lb |
What's Included
- T1SS-B01: CNC machined chromoly flywheel
- Pressure plate cover and diaphragm assembly
- Organic friction plates
- Sprung Mono-Drive hub assembly
- Floater
- Monoloc collar
- Release bearing
- Alignment tool
- Pilot bearing when required
About ACT
ACT engineers performance clutch systems with tested clamp load, balanced assemblies, and application specific driveline compatibility.
FAQ
What is the T1SS-B01?It is the exact manufacturer part number for this twin disc clutch kit.
Which transmission is required?A compatible 6 speed manual transmission is required.
Does it fit 2017 or 2018 models?No. ACT lists applications only through model year 2016 for this part.
What friction material is used?The discs use organic friction material, not ceramic pucks.
What is the torque capacity?The rated capacity is 690 ft-lb.
Is the kit only for xDrive cars?No. The verified applications include rear wheel drive and xDrive models.
Is a flywheel included?Yes. A CNC machined chromoly flywheel is included.
What warranty applies?ACT lists a 12 month warranty.
Installation Instructions
- Before installing T1SS-B01, confirm the BMW is equipped with a compatible N54 or N55 engine and 6 speed manual transmission.
- Remove the transmission and install the flywheel and clutch components in the documented ACT sequence using the specified torque values.
- Verify release bearing operation and clutch engagement before road testing, then follow the ACT break in procedure.
ACT
ACT (Advanced Clutch Technology) parts are stocked at Black Ops Auto Works. Shop clutch kits, pressure plates, clutch discs, flywheels, release bearings, pilot bearings, and alignment tools for a broad range of import and domestic platforms including Subaru, Mitsubishi, Honda, Mazda, BMW, Ford, Audi, Volkswagen, and Nissan. Every product is filterable by year, make, model, trim, and engine so the correct clutch ships the first time. Black Ops Auto Works carries 555 ACT SKUs across clutch kits, discs, flywheels, and drivetrain hardware categories. What This Brand Covers ACT is a US manufacturer of performance clutch systems built for street, strip, and track use. The lineup ranges from HD Performance Street clutches designed for daily driven cars to XT and race sprung and rigid disc clutch kits built for serious horsepower and repeated abuse. Product Range ACT clutch kits, individual pressure plates and discs, flywheels, release and pilot bearings, and clutch alignment tools cove...
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