Cast iron OEM flywheels are designed for the daily driver to produce good acceleration and smoother gear changes, and an easier start from a dead stop. OEM flywheels are perfect for most applications even in slightly modified set ups, however when looking for real performance flywheel with a stroker motor or supercharged application the OEM flywheel needs to go and be replaced either with a lighter high performance aluminum flywheel for the street or strip or a heavy duty billet steel flywheel for better launches at the track. Whether accelerating onto the freeway or on the race track for a pass, a lighter aluminum flywheel will increase acceleration and shifting performance.  Brothers Performance offers OEM replacement flywheels, billet steel and lightweight aluminum flywheels from Centerforce flyhweels, Ford Racing flywheels, RAM flywheels all at great prices.