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GM2-HDSS - ACT Heavy Duty Performance Street Sprung Clutch Kit
$558.00
SKU
GM2-HDSS
Specifications
| Item Description | ACT Heavy Duty Performance Street Sprung Clutch Kit |
|---|---|
| Product Weight (lbs.) | 21.4 |
| Torque Capacity (ft/lbs.) | 629 |
| Torque Capacity Over OE | 32% |
| Disc Material | Organic |
| Clutch Disc Diameter (Inches) | 10.5 |
| Clutch Disc Diameter (Millimeters) | 266 |
| Input Shaft Diameter (inches) | 1.125 |
| Pressure Plate Type | Heavy Duty |
| Warranty | 12 Months (view details) |
Description
GM2-HDSS kit features ACT's most popular Heavy Duty pressure plate and most popular street disc. 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 Performance Street discs feature premium organic materials with high copper content for better heat transfer and steel-backed lining for greater burst strength and durability. These discs have reduced marcel for faster shift action to complement ACT pressure plates, with increased strength and reliability.
| Feel | Light to moderate pedal effort, smooth positive engagement, OE to mild gear rattle |
|---|---|
| Life | Longer friction life, extended by ACT's exclusive diaphragm design |
| Quality | Carefully engineered, precisely assembled, accurately balanced, with premium organic friction materials for heat tolerance and reduced fade |
| Recommended Use | Recommended for street and race use |
| ACT Difference | 100% clamp load tested and dynamically computer balanced for smooth high RPM reliability |
Vehicle Fitment
| Application | Engine |
|---|---|
| 1958 American Motors Ambassador Custom | 5.4 V8 GAS FI | OHV |
| 1958 American Motors Ambassador Super | 5.4 V8 GAS FI | OHV |
| 1959 American Motors Ambassador Custom | 5.4 V8 GAS FI | OHV |
| 1959 American Motors Ambassador Deluxe | 5.4 V8 GAS FI | OHV |
| 1959 American Motors Ambassador Super | 5.4 V8 GAS FI | OHV |
| 1960 American Motors Ambassador Custom | 5.4 V8 GAS FI | OHV |
| 1960 American Motors Ambassador Deluxe | 5.3 V8 GAS FI 5358cc | OHV |
| 1960 American Motors Ambassador Super | 5.4 V8 GAS FI | OHV |
| 1961 American Motors Ambassador Custom | 5.4 V8 GAS FI | OHV |
| 1961 American Motors Ambassador Custom 400 | 5.4 V8 GAS FI | OHV |
| 1961 American Motors Ambassador Deluxe | 5.3 V8 GAS FI 5358cc | OHV |
| 1961 American Motors Ambassador Super | 5.4 V8 GAS FI | OHV |
| 1962 American Motors Ambassador 400 | 5.4 V8 GAS FI | OHV |
| 1962 American Motors Ambassador Custom | 5.4 V8 GAS FI | OHV |
| 1962 American Motors Ambassador Deluxe | 5.3 V8 GAS FI 5358cc | OHV |
| 1963 American Motors Ambassador 800 | 5.3 V8 GAS FI 5358cc | OHV |
| 1963 American Motors Ambassador 880 | 5.4 V8 GAS FI | OHV |
| 1963 American Motors Ambassador 990 | 5.4 V8 GAS FI | OHV |
| 1964 American Motors Ambassador 990 | 5.3 V8 GAS FI 5358cc | OHV |
| 1965 American Motors Ambassador 880 | 5.3 V8 GAS FI 5358cc | OHV |
| 1965 American Motors Classic 550 | 5.3 V8 GAS FI 5358cc | OHV |
| 1965 American Motors Classic 660 | 5.3 V8 GAS FI 5358cc | OHV |
| 1965 American Motors Classic 770 | 5.3 V8 GAS FI 5358cc | OHV |
| 1965 American Motors Marlin Base | 5.3 V8 GAS FI 5358cc |
| 1966 American Motors Ambassador 880 | 5.3 V8 GAS FI 5358cc | OHV |
| 1966 American Motors Ambassador 990 | 5.4 V8 GAS FI | OHV |
| 1966 American Motors Classic 550 | 5.3 V8 GAS FI 5358cc | OHV |
| 1966 American Motors Classic 770 | 5.3 V8 GAS FI 5358cc | OHV |
| 1966 American Motors Marlin Base | 5.3 V8 GAS FI 5358cc |
| 1967 American Motors Marlin Base | 5.6 V8 GAS FI 5585cc |
| 1967 American Motors Rebel 550 | 5.6 V8 GAS FI 5585cc |
| 1967 American Motors Rebel 770 | 5.6 V8 GAS FI |
| 1967 American Motors Rebel 770 | 5.6 V8 GAS FI 5585cc |
| 1967 American Motors Rebel SST | 5.6 V8 GAS FI |
| 1967 American Motors Rebel SST | 5.6 V8 GAS FI 5585cc |
| 1968 American Motors AMX Base | 5.6 V8 GAS FI 5585cc | OHV |
| 1968 American Motors AMX Base | 6.4 V8 GAS FI 6391cc | OHV |
| 1968 American Motors Rebel 550 | 5.6 V8 GAS FI 5585cc |
| 1968 American Motors Rebel 770 | 5.6 V8 GAS FI 5585cc |
| 1968 American Motors Rebel SST | 5.6 V8 GAS FI 5585cc |
| 1969 American Motors AMX Base | 5.6 V8 GAS FI 5585cc | OHV |
| 1969 American Motors AMX Base | 6.4 V8 GAS FI 6391cc | OHV |
| 1969 American Motors Javelin Base | 6.4 V8 GAS FI 6391cc |
| 1969 American Motors Javelin SST | 6.4 V8 GAS FI 6391cc |
| 1969 American Motors Rebel Base | 5.6 V8 GAS FI |
| 1969 American Motors Rebel SST | 5.6 V8 GAS FI |
| 1969 American Motors Rebel SST | 6.4 V8 GAS FI |
| 1970 American Motors AMX Base | 5.9 V8 GAS FI |
| 1970 American Motors AMX Base | 6.4 V8 GAS FI |
| 1970 American Motors AMX Base | 5.9 V8 GAS FI |
| 1970 American Motors AMX Base | 6.4 V8 GAS FI 6391cc |
| 1970 American Motors Javelin Base | 5.9 V8 GAS FI |
| 1970 American Motors Javelin Base | 6.4 V8 GAS FI 6391cc |
| 1970 American Motors Javelin SST | 5.9 V8 GAS FI |
| 1970 American Motors Javelin SST | 6.4 V8 GAS FI 6391cc |
| 1970 American Motors Javelin SST Mark Donohue | 5.9 V8 GAS FI |
| 1970 American Motors Javelin SST Trans Am | 5.9 V8 GAS FI |
| 1970 American Motors Rebel Base | 6.4 V8 GAS FI 6391cc |
| 1970 American Motors Rebel SST | 6.4 V8 GAS FI |
| 1970 American Motors Rebel The Machine | 6.4 V8 GAS FI |
| 1970 American Motors Rebel The Machine | 6.4 V8 GAS FI 6391cc |
| 1971 American Motors Hornet Base | 5.9 V8 GAS FI |
| 1971 American Motors Hornet Base | 5.9 V8 GAS FI |
| 1971 American Motors Hornet SC/360 | 5.9 V8 GAS FI |
| 1971 American Motors Hornet SC/360 | 5.9 V8 GAS FI |
| 1971 American Motors Hornet SST | 5.9 V8 GAS FI |
| 1971 American Motors Hornet SST | 5.9 V8 GAS FI |
| 1971 American Motors Hornet Sportabout | 5.9 V8 GAS FI |
| 1972 American Motors Hornet SST | 5.9 V8 GAS FI |
| 1972 American Motors Hornet SST | 5.9 V8 GAS FI |
| 1972 American Motors Hornet Sportabout | 5.9 V8 GAS FI |
| 1972 American Motors Hornet Sportabout | 5.9 V8 GAS FI |
Kit Contents:
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