The ACT T1SS-N04 Mod-Twin 225 Heavy Duty Sprung Street kit is engineered for the RB26DETT-powered 1999-2002 Nissan Skyline GT-R (R34), a high-powered AWD platform. It unites uncompromised pedal feel, durability, and engagement quality with very high torque capacity by combining twice the organic friction surfaces of a single-disc clutch with an ultra-durable spring-center Mono-Drive hub in a fully modular design. Each diaphragm spring undergoes an exclusive four-stage heat-treating process for a consistent, light pedal feel. Steel-backed friction plates deliver a stable friction coefficient, strong heat capacity, and long clutch life, transferring torque uniformly to the sprung Mono-Drive hub to extend input shaft life and reduce driveline shock. The kit includes a CNC-machined, dynamically balanced flywheel, pressure plate cover, diaphragm spring, face, puck-style ceramic friction plates, sprung Mono-Drive hub assembly, floater, patented Monoloc collar, release bearing, alignment tool, and pilot bearing (if needed). Mod-Twin clutches are fully rebuildable and most components can be ordered separately.
WarrantyInstallation Instructions
Specifications:
- Kit Contents: CNC-machined flywheel + Mono-Drive hub twin-disc clutch assembly
- Part Number: T1SS-N04
"Excellence in Performance", backed by the best one-year warranty in the industry.
Vehicle Applications:
| Year | Make | Model | Trim |
|---|---|---|---|
| 1999 | Nissan | Skyline GT-R (R34) | Base |
| 2000 | Nissan | Skyline GT-R (R34) | Base |
| 2001 | Nissan | Skyline GT-R (R34) | Base |
| 2002 | Nissan | Skyline GT-R (R34) | Base |
Frequently Asked Questions
What vehicles does the ACT T1SS-N04 clutch kit fit?
The T1SS-N04 is engineered specifically for the 1999-2002 Nissan Skyline GT-R (R34) with the RB26DETT engine. See the Vehicle Applications table above.
What does the T1SS-N04 Mod-Twin kit include?
It includes a CNC-machined, dynamically balanced flywheel, pressure plate cover, diaphragm spring, puck-style ceramic friction plates, sprung Mono-Drive hub assembly, floater, Monoloc collar, release bearing, alignment tool, and pilot bearing if needed.
Is the T1SS-N04 clutch rebuildable?
Yes. Mod-Twin clutches are fully rebuildable and most components, including the friction plates, can be ordered separately from ACT.
Does the T1SS-N04 kit come with documentation?
Yes. ACT provides a Warranty document and Installation Instructions, both linked above.
