Vehicle Fitment

• 2007–2018 BMW 3.0L Turbo, N54 and N55 engine platforms

Fitment Notes

• Includes CNC-machined flywheel; designed as a complete modular replacement, not for use with the factory flywheel

Features

• Twin-disc design doubles organic friction surface area for very high torque capacity
• Ultra-durable spring-center Mono-Drive hub reduces driveline shock from torsional vibration
• Diaphragm springs undergo a four-stage heat-treating process for a consistent, light pedal feel
• Steel-backed friction plates with organic friction material for stable friction coefficient and long clutch life
• Patented Monoloc collar and floater design for reliable modular assembly
• All ACT clutch assemblies computer spin-balanced to within .25 oz-in for smooth high-RPM operation

Specifications

• Design: Twin-Disc, Sprung Mono-Drive Hub
• Disc Material: Steel-Backed Organic Friction Plates
• Balance Tolerance: Within .25 oz-in
• Pedal Effort Increase: 15–40% over stock (Heavy Duty range)

Included Components

• 1x CNC-Machined, Dynamically Balanced Flywheel
• 1x Pressure Plate Cover, Diaphragm Spring, and Face
• 2x Puck-Style Ceramic Friction Plates
• 1x Sprung Mono-Drive Hub Assembly and Floater
• 1x Monoloc Collar
• 1x Release Bearing and Alignment Tool

Product Description

The ACT T1SS-B01 Mod-Twin 225 HD Sprung Street kit is built for high-powered N54 and N55-equipped BMWs that need very high torque capacity without sacrificing everyday drivability. Doubling the organic friction surface area and pairing it with a sprung Mono-Drive hub delivers stable engagement and a consistent, light pedal feel while extending input shaft life and cutting driveline shock.

This fully modular kit includes a CNC-machined, dynamically balanced flywheel along with everything needed for installation, from the release bearing to the alignment tool. It's a strong fit for N54/N55 owners running elevated boost or power levels who want a street-friendly clutch that can still hold significant torque reliably over the long haul.