The pull type clutch accommodates higher torque, in conjunction with lighter pedal efforts to produce a superior clutch operation, when adapted to most high-powered vehicles. An EXEDY Original design.
The problem of detachment difficulties is solved by the use of EXEDY original one-touch snap in bearing design. Detachment can easily be accomplished with the use of a screwdriver, alternatively, the bearing can be snapped back into place while activating the release fork.
Twin and Triple Plate
For high-powered applications, EXEDY offers twin and triple Multi-Plate Clutches. These are designed for high power street action as well as drag, road and rally racing. The twin plate clutches are rated for approximately 500 ft.lbs. TQ @ FW. The triple plate clutches are rated for up to and over 800 ft.lbs. TQ @ FW. Twins come with both spring damper discs or solid discs depending on application. Triples are all solid discs and not recommended for street use. All of our multi-plate clutches come with a lightweight, chromoly steel flywheel and the famous purple anodized forged aluminum clutch cover. Depending on the application, we have both strap drive and lug drive models. All have T5001 cerametallic friction materials for extreme heat resistance.
SD Type
This model has been developed for high powered street cars and race cars with up to approximately 600TQ @ FW. They feature ventilated, thick intermediate plates for improved life and spring damper discs to protect your transmission and drive line.
SR Type
This model has twin or triple plates developed to be lightweight for quick response. The Triple plate model is available for over 800TQ @ FW and the twin plate model is rated to approximately 600TQ @ FW. The combination of ultra lightweight solid discs and a lightweight chromoly flywheel gives the driver a lightened pedal effort and quick response. This can improve your times when running at the drag strip or road course. They feature ventilated, thick intermediate plates for improved life.
HR Type
This model has three plates and is developed specifically for high power applications such as over 800TQ @ FW for drag racing. It handles high torque loads and shifts smooth, and because of the lightweight clutch discs, you can reduce your shift times.
Patented Clutch Cushioning Function
The “cushion” function is a new innovation unique to EXEDY. The half engaged “zone” is expanded as a result of a decrease in rigidity of the pivot ring. Ideal pedal effort is achieved as a result of a longer lever ratio of the diaphragm spring coupled with the cushion reaction force.
Patented Center Plate Self Leveling Function
The amount of center plate travel during release is always maintained in a neutral position by the reaction force of the lifting plate attached to both sides of the center plate.
- Improved disengagement (accelerated separation from friction surface).
- Improved disc life by eliminating unbalanced wear at the T/M and F/W side.
- Prevents and lowers mechanical noise.
Working Theory
Due to high temperatures generated by the clutch system during operation, the pressure plate tends to absorb a large portion of that heat, accelerating the wear of the pressure plate side disc. The Lifting plate location remains steady between the location area on the pressure plate shown as (A) and F/W location area shown as (B) on the chart above. Accordingly, the wear of the pressure plate side disc is accelerated, resulting in the F/W side disc automatically being engaged earlier than the pressure plate side, which in turn increases the F/W side disc’s work and wear rate. Therefore, due to an increase in workload during half engaged operations, wear on the F/W side disc will be accelerated causing a reduction in the overall friction material thickness, resulting in the F/W disc registering a similar thickness friction material to that on the pressure plate side.
Carbon Clutch Kit
The flagship model of EXEDY clutches, the Carbon Steel Multi Plate Clutch. These Clutches are lightweight, durable and resilient to high heat, contributing to an improvement in track times.
Warm Up Procedure
Due to the inherent properties of the carbon material, we must specify the proper way to bring the discs up to operating temperature. This Process will heat the discs so they will hold the specified torque rating. The correct method is three, five second “slips” of the clutch within 30 seconds at low RPM.
High Heat Resistance
Carbon materials are baked at more than 3600oF, which allows the carbon material to dissipate heat far better than conventional metallic material. Heat expansion rate is 1/20th of iron therefore eliminating a change in clutch feel that may happen due to distortion caused by expansion during driving. Carbon material not only has a high heat resistance but also a “non-stick” characteristic that eliminates disengagement problems.
Light in Weight
The heaviest components of the clutch system are the clutch cover, intermediate plates and flywheel. Semi-Carbon clutches incorporate an improved cover configuration and lightened flywheel also contributing to a reduction in vehicle rotating weight.
Low Inertia Design
The weight of a carbon clutch disc is one third that of a metallic disc. Utilizing a high friction coefficient Hyper Carbon disc which allows for quicker shift response. Low inertia discs allow the transmission to synchronize in a shorter space of time eliminating time loss during shift changing while also reducing the applied load to the synchronizer.
Easy to Handle
By controlling the carbon fibers and baking temperature, the cross layer type carbon material, which is the most appropriate for high revolution strength and high torque transmission, is applied to tuning car clutches. Semi-carbon clutches offer lightweight, high heat resistance and a stable friction coefficient. EXEDY Carbon clutches are tuned so that at a lower temperature, engagement feeling is improved and conversely at high temperatures, engagement is ideal for spirited driving.
Home 
EXEDY cerametallic clutches are designed to handle the abuse of high power modified engines. Our cerametallic friction material can handle much more abuse than stock type disc assemblies without slipping and fading.
The Hyper Single Clutch is engineered to optimize the performance of cars that are moderately modified, but do not require the clutch capacity of a multi-plate clutch. Similar to our multi-plate clutches, it has a purple anodized, forged aluminum cover. The aluminum cover is stiffer than a stamped cover and therefore allows a higher lever ratio to maintain the pedal efforts at a reasonable level. There is no clamp load deflection as found in a pressed metal type cover.