Quarter Master 37517090 Optimum-V 5.5" Racing Clutch Kit 3-Disc 1-5/32" x 26-Spline Chevy

The Quarter Master Optimum-V 5.5-inch racing clutch kit is engineered for serious motorsports applications, from NASCAR Cup Series teams to road course and short track racers. This complete 3-disc clutch system features an innovative open cover design that delivers maximum durability combined with the industry's lowest moment of inertia for a metallic clutch.

Key Features:

• 5.5-inch diameter 3-disc clutch configuration for balanced performance and heat management
• 1-5/32-inch x 26-spline hub for Chevrolet small block applications with 2-piece rear main seal
• Premium bronze-sintered metallic friction discs resist wear and heat for maximum performance
• 6-leg design with gas slots provides maximum cooling and heat dissipation
• Integrated wear pins hold clearances for longer cover life
• Open cover design for cleaner, cooler operation and superior durability
• Reduced moment of inertia for quicker starts and deeper braking
• Completely rebuildable internals with one-piece aluminum cover
• Complete kit includes clutch assembly with button-style flywheel

The Optimum-V is trusted by professional racing teams worldwide for its unmatched reliability and performance. Designed for internally balanced early Chevrolet engines with 2-piece rear main seals, this clutch delivers quick, smooth shifts while significantly reducing weight compared to stock components. Ideal for asphalt late models, road racing, and high-performance drag racing applications where lightweight construction and consistent performance are critical.