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.

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

Firstly, the flywheel should provide a consistent, friction-enhancing surface for the clutch disc. Flywheels also aid in proper inertia, determined by the flywheel weight. Inertia controls the ratio of power to acceleration. It 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 the amount of inertia it provides can also affect drivability. Lastly, the flywheel must provide a proper balance at rpm, which means no dimensional runout that produces engine damaging and power-robbing vibrations and allows smooth engine revolutions.

SPEC flywheels are made in high-carbon billet steel and aircraft-quality billet aluminum to allow for specific inertia needs. The aluminum and most steel SPEC units are rebuildable.

They feature a replaceable steel friction plate made from a friction-enhancing steel metal specially formulated for optimum clutch bedding and holding power. SPEC spends a lot of time and effort researching and developing 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.

Note:

The photo is only for reference; the actual product may differ.