ACT Mod-Twin 225 HD Rigid Race Clutch Kit – 2007–2018 BMW 3.0L Turbo (N54/N55)

Conquer aggressive launches and rapid shifting in your high-powered BMW with the ACT Mod-Twin 225 HD Rigid Race Clutch Kit — engineered specifically for the 2007–2018 BMW N54 (twin-turbo) and N55 (single-turbo) 3.0L inline-six. The T1R-B01 Mod-Twin 225 HD Rigid Race Kit tackles the aggressive launches and rapid shifting demands of high-powered AWD and RWD BMW builds by combining twice the ceramic friction surfaces of a single-disc clutch with a no-nonsense solid Mono-Drive hub in a completely modular, rebuildable design. A serious race and track clutch for N54/N55 BMW builds pushing beyond the limits of OEM or street-oriented clutch systems.

⚠️ Race/Track Clutch – Not Recommended for Street Use: The Mod-Twin 225 HD Rigid Race features a solid (rigid) Mono-Drive hub with no sprung damper — designed for race and track applications where aggressive engagement and maximum torque capacity are prioritized over street drivability. Rigid hub clutches transmit significantly more NVH and drivetrain shock than sprung hub designs and are not recommended for daily street driving. Verify this is the correct clutch specification for your application before ordering.

Key Features

• Mod-Twin Dual Ceramic Puck Design – 2x Friction Surface: Twin ceramic puck-style friction plates deliver twice the friction surface area of a single-disc clutch — dramatically increased torque capacity for high-powered N54/N55 builds. High friction coefficient ceramic material delivers superior heat capacity and long clutch life under sustained race and track use
• Mono-Drive Solid Hub – Rigid Race Design: Solid chrome-moly Mono-Drive hub with no sprung damper — heat treated for strength and durability. One continuous spline extends input shaft life. The rigid design allows for quicker, more precise shifts and trouble-free service in race applications. Not recommended for street use
• HD Pressure Plate – Four-Stage Heat Treated Diaphragm Spring: Each diaphragm spring endures ACT's exclusive four-stage heat treating process, providing a consistent, light pedal feel despite the HD clamping force — a key ACT engineering advantage for race clutch drivability
• Complete Kit – CNC Flywheel Included: Includes a CNC-machined and dynamically balanced flywheel, pressure plate cover, diaphragm spring, face, puck-style ceramic friction plates, rigid Mono-Drive hub, floater, patented Monoloc Collar, release bearing, alignment tool, and pilot bearing (if needed) — everything required for a complete clutch system installation
• Fully Rebuildable Modular Design: Mod-Twin clutches are fully rebuildable — most components can be ordered separately for cost-effective maintenance and rebuilds. The modular design allows individual component replacement without replacing the entire kit
• N54 & N55 Coverage – 2007–2018: Fits the 2007–2018 BMW 3.0L Turbo inline-six across both the N54 (twin-turbo) and N55 (single-turbo) engine variants — verify your specific BMW model, year, and transmission before ordering

Specifications

• Type: Twin-Disc Clutch Kit (Mod-Twin)
• Diameter: 225mm
• Friction Material: Ceramic Puck
• Hub: Mono-Drive Solid (Rigid — No Sprung Damper)
• Pressure Plate: HD (Heavy Duty)
• Flywheel: CNC-Machined, Dynamically Balanced (Included)
• Design: Fully Rebuildable Modular
• Engine: BMW N54 (Twin-Turbo) / N55 (Single-Turbo) 3.0L Inline-Six
• Fitment: 2007–2018 BMW 3.0L Turbo (N54/N55)
• Part Number: T1R-B01

Note: Rigid (solid) hub design — not recommended for daily street driving. Verify your specific BMW model, year, and transmission configuration before ordering — N54/N55 BMW models span multiple chassis (E90/E92/E93, F30, F10, F13, etc.) and transmission variants. A professional clutch break-in procedure is required after installation. Professional installation by an experienced drivetrain shop is strongly recommended.