Clutch Masters FX850 Twin Disc Street Clutch Kit Subaru STI 2004-2021 | 15017-TD8S-XW

Product Fitment: 

2004-2021 Subaru STI

Own serious horsepower? Then the ClutchMasters 850 Series Street Twin-Disc Clutch Kit is your next drivetrain upgrade. Engineered for high-power applications, this kit bridges the gap between pure race gear and everyday drivability—letting you dominate on the strip, handle track days, or enjoy smooth, confident engagement on the street.

Key Features:

• Twin-Disc Design (8.5″ / 216 mm): Two clutch discs deliver a large effective friction area for stronger hold while keeping rotating mass low for faster rev response.

• Street-Friendly Engagement: The “Street & Race” stage (TD8S) combines one sprung ceramic disc and one rigid “Fiber Tuff” disc for smoother engagement than typical race-only setups.

• Billet Aluminum Cover Assembly: The hard-anodized billet cover minimizes flex and provides sharper pedal feel with improved clamp efficiency compared to cast units.

• Quick-Release (QR) Pressure Plate System: A proprietary three-spring bolted system reduces internal noise and chatter by up to 50%, making this twin-disc usable for both street and race applications.

• Multiple Configurations: Available with steel or aluminum flywheels, and in both push-type and pull-type configurations to suit a wide range of vehicles.

• Track Proven and Horsepower-Ready: Built to handle high-power applications—regularly used in builds pushing 600 whp+ while maintaining streetable drivability.If you’re running major modifications—big turbo, built motor, or upgraded transmission—you need a clutch that can handle the power. The ClutchMasters 850 Series delivers exceptional holding capacity with crisp, responsive engagement while remaining practical for daily use. Whether you’re at the track or on the road, this clutch is engineered to perform under pressure.

Important Notes & Fitment:

• Flywheel sold separately.

• Pedal pressure is firmer than stock, as expected from a performance twin-disc system.

• Ideal for high-performance and competition use; not recommended for low-power stock engines.