Spec Clutch SF463FT Stage 3+ Performance Clutch Kit 26-Spline

The Spec Clutch SF463FT is a Stage 3+ performance clutch kit engineered for 26-spline hub transmissions, including Tremec TKO and G-Force units. Designed and hand-built in the U.S.A., this kit delivers the ideal balance of aggressive torque capacity and real-world street drivability for heavily modified performance vehicles.

As SPEC's flagship performance stage, the Stage 3+ steps beyond the standard Stage 3 by featuring a full-face carbon semi-metallic disc in place of a 6-puck design. This upgrade offers torque capacities comparable to Stage 5 while maintaining drivability equal to or better than Stage 3 — making it the top choice for high-power street/strip builds running forced induction or other major power adders.

Key Features:

• 790 ft-lb torque capacity at the flywheel
• Full-face carbon semi-metallic friction material for unparalleled life, friction coefficient, and drivability
• High-clamp pressure plate for maximum clamping force
• 26-spline hub — fits Tremec TKO and G-Force transmissions
• Double-sprung hub with spring cover reliefs for flexibility and vibration dampening
• Heat-treated components for strength and long-term durability
• Includes high-torque sprung hub and disc assembly, bearing, and alignment tool kit
• SFI approved for sanctioned racing
• Designed, hand-built, and tested in the U.S.A.

The SF463FT is ideal for street, drag racing, road racing, autocross, drifting, rallye, and pulling applications. It provides sharp but smooth engagement with a manageable pedal feel, even under high-stress race conditions. A SPEC flywheel is recommended for optimal performance and proper clutch seating.