ACT Clutches

ACT Heavy Duty Pressure Plates provide increased torque capacity, durability, and extended clutch life. What makes ACT pressure plates the highest standard in the industry? First, manufacturing always begins with new units. These are not rebuilt from worn out parts. Second, pressure is increased the right way. Altering the geometry alone is not enough. Instead, a stronger diaphragm is engineered. ACT diaphragms are heat treated using an exclusive 3 stage process and the release bearing contact area is hardened to reduce wear. Third, the pressure and release travel of the unit is designed to be in the optimum working range. Finally, by using proven assembly procedures consistency and precision is assured. Every unit ACT produces is accurately balanced and tested. No guesswork, no hype, only proven engineering and calculated results.

ACT Xtreme Pressure Plates deliver the maximum holding power available! For high horsepower streetcars, combine this high clamp pressure plate with an ACT Street Disc to maintain smooth engagement and obtain high torque capacity. For racing, combine the ACT Xtreme Pressure Plate with the Xtreme Race Disc for the ultimate in torque capacity, durability and quick shifting. What makes these units so unique is the radical increase in clamp load developed from a single specially designed diaphragm. ACT employ's good engineering secrets to maximize load and reduce flex. The result is maximum torque capacity and long life while maintaining good release clearance for fast, clean shifting. On some units, such as the DSM, ACT gussets the pressure plate cover to reduce flex caused by the high pressure. These are made with the same high standard as ACT Heavy Duty Pressure Plates. ACT Xtreme Pressure Plates can be found on many of the fastest cars on the track. ACT Xtreme Pressure Plate can be identified throughout the application chart when the pressure plate number is followed by a suffix "X".

ACT Street Discs are designed for smooth engagement, quiet operation and improved durability using only the best organic, spring center designs. When an ACT Modified Disc is available, the suffix "M" appears in the disc part number. The marcel of the disc has been reduced to enable quicker action. When a special ACT Performance Organic disc is available, the suffix "S" will appear. These discs use special performance linings designed to withstand high heat and abuse. Most of these "S" discs are also modified for quicker shifting. What is all the hype about different lining materials available? ACT still contends that nothing can beat a good quality organic disc for street use. Virtually all the premium sport car manufacturers use organic discs. The DSM AWD turbot is a good illustration. This application can be especially hard on clutches for several reasons: all wheel drive, the heavy weight of the car, and limited clutch size. Yet because of the durability of the ACT Performance Organic Street Disc when used with ACT's Xtreme Pressure Plate, many of the fastest DSM owners enjoy smooth engagement, 11 second and even 10 second time slips.

Attack the track with the ACT Xtreme Disc. Shifting is quick and sure due to the lightweight rigid design. Available in 4 or 6 pad solid hub design, these pads (pucks, buttons) are highly durable and resistant to heat. The copper ceramic material holds approximately 28% more torque than an organic lining. Copper ceramic discs engage fairly harsh and are not normally recommended for street use. ACT recommends 6 pad discs for larger sizes to absorb more heat and for smoother engagement. The 4 pad discs engage very harsh, shift faster and are well suited for smaller disc sizes from smaller engines. Because the 4 pad discs are so harsh they are available upon special request only.