Spec Clutch SP163F Stage 3 Plus High-Performance Clutch Kit

The SPEC SP163F Stage 3 Plus Clutch Kit is SPEC's flagship single-disc performance clutch, engineered for heavily modified street and race engines that demand high torque capacity without sacrificing daily drivability. Stepping up from the Stage 3, the Stage 3 Plus replaces the puck-style disc with a full-faced carbon semi-metallic friction surface for smoother, more predictable engagement and superior wear characteristics.

Unlike traditional puck clutches, the full-face design distributes clamping pressure evenly across the entire friction surface, resulting in improved engagement quality, better modulation in stop-and-go traffic, and an extended service life under demanding conditions. The Stage 3 Plus is widely regarded as the longest-wearing performance friction mix in the SPEC lineup, making it the preferred choice for high-power street builds and weekend track cars that require both high torque capacity and manageable street manners.

Key Features:

• Full-faced carbon semi-metallic friction disc — unparalleled life, friction coefficient, and drivability in a single package
• High-clamp pressure plate — maximizes torque transfer for heavily modified applications
• High-torque double-sprung hub and disc assembly — spring cover reliefs provide flexibility while heat-treated components ensure strength and durability
• Complete kit — includes pressure plate, disc, bearing, and installation tool
• Made in the U.S.A.

Intended Use: Street, Drag Racing, Drift, Road Race, Rally, Autocross, Pulling

The SPEC Stage 3 Plus delivers the durability of a race clutch with engagement characteristics that remain comfortable for everyday driving — making it SPEC's most versatile single-disc stage for high-performance street and track applications.