Advanced Clutch Set Diaphragm Small Sprung 4 Paddle - MB4-HDG4

Clutch Set; Race; 7.87 Inch Clutch Diameter; 7/8 Inch x 20 Spline Input Shaft; Diaphragm; Steel Pressure Plate; Single Disc/ Ceramic Friction Material; 4 Paddle Design/ Sprung Hub; With Throwout Bearing And Alignment Tool

MPN: MB4-HDG4

This ACT clutch kit includes a Heavy-Duty pressure plate, 4-pad, spring-centered race disc, release bearing, pilot bearing and alignment tool. The Heavy-Duty pressure plate allows for a 20 to 50 Percent increase in clamp load over the stock unit. ACT’s Heavy-Duty pressure plate features precision CNC machined parts, drive straps and rivets to securely locate contact face to the cover for quiet, trouble-free operation. The Heavy-Duty pressure plate will have a stock to moderate pedal feel. ACT pressure plates feature creative diaphragm designs to increase clamp load, reduce deflection and maximize clutch life. All diaphragms endure an exclusive four-stage, heat-treating process for unparalleled performance. The Heavy-Duty pressure plate meets SFI Specification 1.1. ACT’s 4-pad, spring-centered race disc features a spring-center construction to properly dampen torsional vibrations for quieter operation and resist failure even under harsh conditions. ACT spring retainers utilize wraparound spring windows and thicker retainer stampings to provide spring support, reduce stress concentrations, and increase strength and reliability. 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. With the 4-pad, spring-centered race disc engagement is harsher, but shifting is faster. ACT’s 4-pad, spring-centered race disc is well-suited for the smaller disc sizes in smaller engines. All ACT race discs are certified as meeting SFI Specification 1.1 and are legal in all racing organizations that require SFI certification. The kit is completed with a quality, stock replacement release bearing, pilot bearing and alignment tool.

Features

• Lightweight Rigid Design For Quicker Shifts And Smooth, Trouble Free Service
• Spring Center Construction Properly Dampens Torsional Vibrations For Quieter Operation
• Center Section Resists Failure Even Under Harsh Conditions
• Chrome Moly Hub Is Heat Treated For Strength And Durability
• Clamp Load Increase Of 20 To 50 Percent Over Stock With A Stock To Moderate Pedal Feel
• Premium Ceramic Friction Materials Provide High Heat Tolerance, High Coefficient Of Friction, Low Wear Rates And Will Hold Approximately 28 Percent More Torque Than Standard Organic Materials
• Most Clutch Kits Are Certified As Meeting SFI Specification 1.1 And Are Legal For Competition In All Racing Organizations Where SFI Certification Is Required
• Limited 1 Year Warranty