replaces the factory flywheel/flex plate with a improved billet
one piece design, eliminates the heavy cast iron and the weak
stamped steel flex plate. This is a must with the high torque
in conjunction with a better designed torque converter that
can transfer the torque with no slip. The flex plate is bolted
to the crank shaft, then the converter is bolted to flex plate.
The torque from your is transfered to the flex plate, from
the flex plate to the torque converter then to your input
shaft in the trans. With increased torque from the engine
and no slip out of the converter it can crack and/or rip the
center out of a stock flex plate.
A SFI certified flywheel flex plate is required on drag racing
vehicles running 11.99 and quicker in the 1/4 mile and 7.49
and quicker in the 1/8 mile, or any vehicle exceeding 135
mph. It was changed in 2008 from the 29.1 SFI specification
to the SFI specification 29.3 for automatic transmission flex
plates for diesel applications. The new rules for the flex
plate requires that the material can not be a stamped metal
as many OEM and after market flex plates are. To maintain
the SFI specification 29.3 requirements, the flex plate must
be replaced every three years.