Advanced Clutch Set Diaphragm Rigid 4 Paddle - HW4-HDR4

Clutch Set; Race; 8.3 Inch Clutch Diameter; 7/8 Inch x 20 Spline Input Shaft; Diaphragm; Steel Pressure Plate; Single Disc/ Ceramic Friction Material; 4 Paddle Design/ Rigid Hub; With Advanced Clutch Technology Part Number 4212004 Clutch Disc/ RB428 Clutch Throwout Bearing/ PB1002 Clutch Pilot Bearing/ H023 Clutch Pressure Plate/ AT20 Clutch Alignment Tool; Requires Clutch Flywheel Part Number ACT600120 Depending On Application Only If Listed

MPN: HW4-HDR4

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 rigid race discs are made with high quality, ceramic friction materials and all friction pads are measured, sorted and matched before assembly to ensure each disc is uniform in thickness. The chrome-moly hub is heat-treated for strength and durability, and the lightweight, rigid design allows for quicker shifts and smooth, trouble-free service. With the 4-pad rigid race disc engagement is harsher, but shifting is faster. The 4-pad rigid race disc is well-suited for the smaller disc sizes in smaller engines. This disc is not recommended for street use. All ACT race discs are certified as meeting SFI Specification 1.1 and are legal in all racing organizations that require SFI certification.

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