ACT Rigid Race Disc 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.

• Fitment begins in 09/1977
• Fits up till 07/1985
• Spline Size (Inches): 1-1/8
• Disc Type: Race Disc
• Spline Count: 21
• Product Weight (lbs.): 1.8
• Aggressive engagement, quickest shifts, increased gear rattle
• Premium ceramic friction materials provide moderate wear rates and high heat tolerance, rigid design may increase spline wear
• Lightweight rigid design, chromoly hub is heat-treated for strength and durability
• Recommended for race use only
• High burst strength and holds 28% more torque than typical organic materials

4224007 is a 4-pad rigid race disc made with high quality, ceramic friction materials. The disc engagement is harsher, but shifting is faster. The race disc features top grade rivets to securely fasten the part together. The rivet design and materials are carefully selected for maximum strength. The 4-pad rigid race disc 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.