2 Disc Clutch Pack Coarse Heat Treated

The QUARTER MASTER 2 Disc Clutch Pack Coarse Heat Treated (SKU QTR226080S, MPN 226080S) is a high-performance clutch disc assembly engineered for manual transmission systems requiring reliable torque transfer and thermal stability. This pair of rigid-hub clutch discs features a 7.25-inch diameter with 1-1/8 inch by 10-spline shaft engagement, delivering the precision fit demanded in performance and street applications where consistent clutch engagement is critical.

The coarse heat-treated friction surface is engineered to withstand elevated temperatures generated during aggressive driving, track use, or high-torque engine applications. Heat treatment hardens the friction material, extending service life and reducing fade under sustained load cycles. The rigid hub design provides positive engagement with the transmission input shaft, minimizing slippage and ensuring precise power delivery with minimal chatter. These specifications translate directly to improved shift quality, reduced clutch wear, and more predictable modulation during acceleration or engine braking events.

This clutch assembly is ideal for builders and technicians upgrading worn clutch packs, restoring street rods, or servicing performance transmissions where OEM specifications are critical. The universal spline design and industry-standard 7.25-inch diameter fit a broad range of domestic and imported manual transmissions, making it a practical solution for both single-car shops and high-volume rebuilders. Whether addressing clutch slippage, restoring engagement feel, or preparing for power increases, this heat-treated pair delivers the thermal resistance and mechanical reliability expected in modern drivetrain applications.