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HA1-HDR4 - ACT Heavy Duty Race Rigid 4 Pad Clutch Kit

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$510.16
SKU
HA1-HDR4

Specifications

Specifications
Item Description ACT Heavy Duty Race Rigid 4 Pad Clutch Kit
Product Weight (lbs.) 9.3
Torque Capacity (ft/lbs.) 270
Torque Capacity Over OE 76%
Disc Material Ceramic
Clutch Disc Diameter (Inches) 7.9
Clutch Disc Diameter (Millimeters) 200
Input Shaft Diameter (inches) 0.875
Pressure Plate Type Heavy Duty
Warranty 12 Months (view details)

Description

HA1-HDR4 kit features ACT's most popular Heavy Duty pressure plate. ACT Heavy Duty pressure plates use exclusive diaphragm design to increase clamp load, reduce deflection and maximize clutch life. All diaphragms endure a four-stage, heat-treating process for unparalleled performance. ACT pressure plates have precision cover stampings to provide rigidity and consistency. ACT's 4-pad rigid race discs are made with high quality, ceramic friction materials. The chrome-moly hub is heat-treated for strength and durability. 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.

Description
Feel Light to moderate pedal effort, aggressive engagement, increased gear rattle
Life Moderate friction life, extended by ACT's exclusive diaphragm design, rigid design may increase spline wear
Quality Carefully engineered, precisely assembled, accurately balanced, uses select ceramic friction materials for high heat tolerance and maximum performance
Recommended Use Recommended for race use only
ACT Difference 100% clamp load tested and dynamically computer balanced for smooth high RPM reliability

Vehicle Fitment

Fitment Info
Application Engine
1983 Honda Accord Base 1.8 L4 GAS FI 1751cc
1983 Honda Accord LX 1.8 L4 GAS FI 1751cc
1983 Honda Prelude Base 1.8 L4 GAS FI 1829cc
1984 Honda Accord Base 1.8 L4 GAS FI 1829cc
1984 Honda Accord LX 1.8 L4 GAS FI 1829cc
1984 Honda Prelude Base 1.8 L4 GAS FI 1829cc
1985 Honda Accord Base 1.8 L4 GAS FI 1829cc
1985 Honda Accord Base 1.6 L4 GAS FI 1598cc
1985 Honda Accord LX 1.8 L4 GAS FI 1829cc
1985 Honda Accord S 1.8 L4 GAS FI 1829cc
1985 Honda Accord SEi 1.8 L4 GAS FI 1829cc
1985 Honda Prelude Base 1.8 L4 GAS FI 1829cc
1986 Honda Prelude Base 1.8 L4 GAS FI 1829cc
1987 Honda Prelude Base 1.8 L4 GAS FI 1829cc

Frequently Asked Questions

Are ACT clutches balanced?
Yes! All ACT clutch assemblies are computer spin balanced to within .25 oz-in to guarantee help smooth operation across the entire RPM range. For comparison, stock production clutches are typically balanced to within .50 oz-in. Lower is definitely better!
Will an ACT clutch increase pedal effort?
ACT pressure plates are specifically designed to handle high torque applications. With ACT's durable design, expect an increase in pedal effort between 15-40% (Heavy Duty) and 50-80% (Xtreme), depending on the application. Clutches developed with less pedal effort often result in a lack of longevity, torque capacity and/or engagement quality.
Do ACT clutches require a break in period?
For organic street discs, we recommend breaking in the clutch for 300-500 miles with mild engagement, such as stop-and-go city driving prior to racing or spirited driving. ACT race discs usually only require a few hard slips to lap in the surfaces prior to normal driving or racing. Do not overheat the clutch during the break in period, as this can result in friction surfaces fusing together, hot spots, and friction surface glazing.
Are ACT clutches repairable or rebuildable?
In some situations, rebuilds or repairs may be possible (see warranty), after inspection of the clutch assembly. Please contact our technical department for further information. Because of special modifications, we do not recommend servicing by a general clutch rebuilder.
How much does an ACT clutch weigh?
The weight of the ACT clutch assembly will usually be the same as a stock OEM clutch assembly.

PROP 65 WARNING

This product can expose you to chemicals including carbon black, glass wool fibers, and silica (in clutch discs), chromium and nickel, which are known to the State of California to cause cancer or birth defects or other reproductive harm. for more information, visit www.P65Warnings.ca.gov