ACT Sprung Race Discs are high quality products guaranteeing superior functionality and efficiency! They feature a lightweight, rigid design for quicker shifts and smooth, trouble-free service. These products are available in either 4 or 6-paddle style with high-quality ceramic material, producing increased friction and torque capacity.

• Spline Size (Inches): 3/4
• Disc Type: Race Disc
• Spline Count: 18
• Product Weight (lbs.): 2.5
• Aggressive engagement, quick shifts, OE to mild gear rattle
• Premium ceramic friction materials provide moderate wear rates and high heat tolerance
• Utilizes wraparound spring windows, thicker retainer stampings and a heat-treated, spring steel drive plate to provide support, reduce stress concentrations and increase strength and reliability
• Recommended for race use only
• High burst strength and holds 28% more torque than typical organic materials

4190109 is a 4-pad spring-centered race disc made with high quality, ceramic friction materials. The engagement is harsher, but shifting is faster. The heavy duty torsional dampening springs are stronger, in most cases, than standard springs and are provided in the best sizes and spring rates to suit the application. The race disc features a heat-treated spring steel drive plate and is well-suited for the smaller disc sizes in smaller engines.

Since 1994, Advanced Clutch Technology has specialized in performance clutches and flywheels. All products are made from the highest quality materials and then necessarily tested to ensure they perform to the customers' expectations.