Spec Clutch SB35MTR Mini Twin R-Trim Multi-Disc Clutch Kit

The Spec Clutch SB35MTR Mini Twin R-Trim is a high-performance multi-disc clutch and flywheel assembly engineered for demanding performance driving environments including limited street, drag racing, road racing, time attack, drifting, pulling, and rallye use. The R-Trim disc configuration is suited for street, drag, pulling, and autocross applications.

SPEC Mini Twin assemblies are available in a range of clutch disc and flywheel materials, clamp loads, disc configurations, and diameters — each recommended based on the specific performance demands of the application. Whether the priority is streetability, all-out drag performance, or competitive circuit racing, the Mini Twin platform offers the configuration to match.

Precision Manufacturing:

• Machined to an industry-leading .001-inch tolerance for perfect rotational properties and concentric actuation
• Optimizes balance, drivability, and clutch service life
• SFI-certified flywheel included
• Flywheel CNC-manufactured from high carbon billet steel or aircraft-quality billet aluminum
• Replaceable steel friction plate on flywheel, specially formulated for optimum clutch bedding and holding power

Kit Includes:

• Rebuildable twin-disc clutch assembly
• Billet flywheel
• 10.9-grade bolt kit
• Bearings

Rebuildable Design:

• Units are fully rebuildable by SPEC or by the end user
• Replacement components and rebuild services are always available directly from SPEC

Supported Driving Types: Street, Drag, Pulling, Autocross

SPEC backs this product with a 120-day limited warranty against defects in materials and workmanship for normal use and service. A minimum 450-mile break-in period is required before full-throttle engagement or drag launching.