1994-2004 Mustang V8 Flywheels & Flexplates

Aluminum flywheels have been used for many years for increasing performance. From the earliest days of racing and street build-ups, the world's best engine builders have been installing aluminum flywheels to give their engines the needed edge. Fidanza's aluminum flywheels are significantly lighter than OEM equipment, which results in quicker rev's and more horsepower to the wheels! All Fidanza flywheels are CNC machined to ensure the most accurate dimensions and the best possible finish. Fidanza flywheels are recommended for auto-cross, road racing and street use. (Because lightened flywheels do not store as much inertia, they are not particularly suited to hard launching, such as what is required when drag racing. For this reason, Thunder Racing does not recommend them for serious drag racing applications.)

All billet flywheels are not created equal! Make sure you are getting the features you pay for. RAM billet steel and aluminum flywheels are fully machined and assembled in house. That means when you get your RAM billet flywheel, it is already surface ground, already balanced, and ready to install out of the box. A key feature of RAM aluminum flywheels is the steel insert. A flywheel insert must have enough mass to wick heat away from the clutch without distorting. RAM uses a .250-inch thick inset that is riveted in before the flywheel is surface ground. This assures a parallel friction surface with no run out, and enough material to adequately wick the heat while maintaining flatness over time that thinner inserts simply cannot do. All RAM billet flywheels are SFI certified.

The automotive component most responsible for insuring optimum clutch performance and life is the flywheel. The flywheel's contribution to power transfer is three-fold.

Firstly, the flywheel should provide a consistent and friction enhancing surface for the clutch disc.
Flywheels also aid in proper inertia, which is determined by the flywheel weight. Inertia controls the ratio of power to acceleration and can make a vehicle faster or slower based on gear ratio, tire type, vehicle weight, power output and even the location in the powerband output is achieved. The weight of a flywheel and amount of inertia it provides can also effect drivability.
Lastly, the flywheel must provide a true balance at rpm, which means no dimensional runout that produces engine damaging and power robbing vibrations and allows smooth engine revolutions.

SPEC flywheels are CNC manufactured at an unheard-of .001 tolerance, in an industry where the standard is .010. This precision manufacturing process ensures perfect balance and a perfectly flat bedding surface for the clutch disc, both of which also contribute to the ultimate in safety for competitive environments. All SPEC flywheels carry SFI certification. (sfi link)

To allow for specific inertia needs, SPEC flywheels are made in high carbon billet steel and aircraft quality billet aluminum. The aluminum and most steel SPEC units are rebuildable and feature a replaceable steel friction plate that is made from a friction- enhancing steel metal specially formulated for optimum clutch bedding and holding power. The aluminum and steel materials provide a light and medium weight option for all types of racing. SPEC spends a lot of time and effort on research and development of optimum flywheel dimensions and weights for all types of driving and racing and can optimize your MOI (moment of inertia) to maximize your car's output and performance.