Spec Clutch SN423F Stage 3 Plus High-Performance Clutch Kit

The SPEC SN423F Stage 3 Plus Clutch Kit is the flagship single-disc performance clutch solution engineered for heavily modified street and race engines that demand torque capacity beyond what the standard Stage 3 can provide. It delivers the ideal balance of aggressive holding power and daily street manageability, with superior wear characteristics that make it a top choice for high-output builds.

At the heart of the Stage 3+ is a full-faced carbon semi-metallic friction disc that provides exceptional friction coefficient, outstanding service life, and smooth, predictable engagement in a single package. The double-sprung hub design incorporates spring cover reliefs for drivetrain flexibility, while heat-treated internal components ensure long-term strength and durability under sustained high-torque loads.

Kit Includes:

• High-clamp performance pressure plate
• Full-faced carbon semi-metallic friction disc
• High-torque double-sprung hub and disc assembly
• Release bearing
• Installation tool kit

Ideal Driving Applications:

• Street / Daily Driven High-Performance
• Drag Racing
• Drifting
• Road Racing
• Pulling
• Autocross / Rallye

The SPEC Stage 3+ represents the top of SPEC's street-oriented clutch lineup, stepping up from the Stage 3 with increased torque capacity and improved wear characteristics while retaining a friendly, manageable pedal feel. All SPEC clutch kits are SFI approved and manufactured to exacting tolerances for reliable performance on the street and track.