Many enthusiasts think of EXEDY as solely a manufacturer of high-performance street and racing clutches. In actuality, the company is a nearly $3 billion broad-line supplier of driveline components in the replacement and OEM markets, as well as the performance aftermarket. This unique position provides EXEDY a distinct advantage over many of its smaller competitors.
The crew from EXEDY at the SEMA Show wasn’t there to talk about the company’s annual report, but rather its line of EXEDY Sport Clutches.
EXEDY Stage 1 Organic Racing Sport Clutches are manufactured with premium Ultra-Fiber friction materials that are resistant to slippage and burst. Increased clamp loads give the necessary capacity to handle modified engines. Drivability is similar to the stock clutch, though pedal effort will be slightly higher because of the higher clamp loads. All of its Stage 1 clutch discs have spring center dampers to reduce drivetrain shock and provide smooth clutch engagement.
EXEDY Stage 2 clutches are designed to handle the abuse of more highly-modified engines. The company’s cerametallic friction material can handle a great deal more abuse than stock-type disc assemblies without slipping and fading. All EXEDY Stage 2 cerametallic clutch discs have sprung center dampers to reduce the impact and shock loads transmitted through the drivetrain. The company offers two types of cerametallic discs, thick and thin configurations, along with a cushion button disc.
The EXEDY Hyper Single Series clutch is engineered to optimize the performance of engines that are moderately modified but do not require the capacity of a multi-plate clutch. Similar to multi-plate clutches, the Hyper Single Series has a purple anodized, forged aluminum cover. The aluminum cover is stiffer than a stamped cover and there is no clamp load deflection as found in a pressed metal type cover. Additionally, the pressure plate features a series of turbine-like, airflow enhancing vanes that keep the clutch cooler under extreme operating conditions to improve wear life.
All Hyper Single Sport Clutches come with a chromoly steel flywheel and are normally supplied with a 6-puck cerametallic facing and a spring center damper disc assembly. However, the new VF (Various Friction) disc is available for select vehicles. The chromoly flywheel is lighter than OEM for improved engine response, and a lighter overall assembly. The disc is generally smaller and thinner than the OEM disc making for lower inertia and provides quicker, easier shifting and less wear and tear on the transmission synchros. The higher clamp load and cerametallic friction facings give approximately twice the holding torque of the OEM clutch as well as higher pressures than other single disc clutches.
The company displayed several new applications, both for OEM replacement and well as performance upgrades on some of the most popular performance cars. New are OE replacement kits, as well as Stage 1 organic and Stage 2 cerametallic, kits for the 2016+ Mazda Miata and the 2018 Nissan 370Z. For Nissan Skyline owners, EXEDY now offers a Stage 1 organic and Stage 2 cermetattlic clutch kits for early and late R32 and R33 models.
In addition to the most common clutch applications listed above, EXEDY also offers their Hyper Multi Series, Hyper Compe Series, Hyper Carbon Series, and the Hyper Builder Series, along with replacement parts.
EXEDY Lightweight Flywheels combine light weight, low inertia, and high thermal capacity. They are designed for light- to moderately-tuned racing cars for drag racing, autocross and rally events, as well as street use. They are manufactured from solid one-piece billet chromoly steel or chromoly steel forgings and are specifically designed to reduce weight and inertia for better engine response.
The ring gear teeth are integrated onto the flywheel unlike an aluminum flywheel where the ring gear is pressed onto the flywheel and has the possibility of separating from the flywheel due to the different expansion rates of aluminum and steel. Newly available are lightweight, solid replacements for vehicles fitted with OE dual-mass flywheels. EXEDY lightweight flywheels have passed engineering tests to 15,000-18,000 rpm. Like all EXEDY Sport clutch products, they are all SFI approved.