Spec Clutch SD851-5 Stage Performance Clutch Kit - 1

The SPEC SD851-5 Stage 1 Clutch Kit is a high-performance clutch system engineered for drivers who demand smooth, reliable engagement on the street and at the track. Built around an integrally molded carbon Kevlar-based organic friction lining, this kit delivers excellent wear life and smooth engagement characteristics that surpass OEM clutch quality.

The friction disc features an integrally bonded steel backing designed to withstand high clamp loads and elevated operating temperatures without delamination or distortion. The double-sprung hub incorporates spring cover relieves for added flexibility, while heat-treated internal components provide the strength and durability needed for demanding performance applications.

Key Features:

• Carbon Kevlar-based organic lining — smooth engagement with excellent wear life
• Steel-backed friction disc — withstands high clamp loads and temperatures
• High clamp pressure plate — increased clamping force over OEM
• Double-sprung hub assembly — spring cover relieves for flexibility and heat-treated components for durability
• Multi-compound woven organic disc material — optimized for broad performance use
• Includes bearing and alignment tool kit — everything needed for installation

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

The SPEC Stage 1 is the ideal step-up from a factory clutch for naturally aspirated and mildly modified vehicles that see regular street driving alongside occasional track or off-road use. Designed, hand-built, and tested in the U.S.A., SPEC clutches are manufactured to meet the demands of serious enthusiasts without sacrificing everyday drivability.