Spec Clutch SK611 Stage Performance Clutch Kit - 1

The SPEC SK611 Stage 1 Clutch Kit is a high-performance, street-ready clutch upgrade engineered for drivers who demand smooth engagement without sacrificing durability. Built around an integrally molded carbon Kevlar-based organic lining, this kit delivers confident grip and excellent wear life across a wide range of driving conditions — from daily commutes to weekend track events.

The disc features an integrally bonded steel backing that maintains structural integrity under high clamp loads and elevated temperatures. The double-sprung hub includes spring cover reliefs for added flexibility, while heat-treated internal components provide long-term strength and reliability. With a high-clamp pressure plate and a multi-compound woven organic friction material, this kit offers the ideal balance of streetability and performance headroom.

Key Features:

• Carbon Kevlar-based, high-performance organic friction lining
• Integrally bonded steel-backed disc for strength under high clamp loads and temperatures
• High-clamp performance pressure plate
• Multi-compound woven organic friction material
• Double-sprung hub with spring cover reliefs for flexibility
• Heat-treated hub components for strength and durability
• Includes bearing and alignment tool kit
• 8.500 in. disc diameter | 20-spline input | 0.875 in. input shaft diameter
• Flywheel not included

Designed Driving Applications: Street, Drag, Drift, Road Race, Rallye, Pulling, Autocross

SPEC clutch kits are designed, hand-built, and tested in the USA. The Stage 1 is the entry point into the SPEC performance lineup and is recommended for street and many track or off-road applications where smooth pedal feel and long service life are top priorities.