This Hays steel SFI flexplate has 157 teeth and a 28 oz. external balance.
Hays heavy-duty flexplates for high-performance and competition engines are constructed from a thicker-than-stock steel plate. This enables them to withstand the stress of high-stall torque converters and high-rpm engines. While factory stock plates tend to crack around the crankshaft hub when punished under high torque and rpm conditions, the thicker Hays flexplates can handle the force. All Hays heavy-duty flexplates are zinc-dichromate plated to resist corrosion and are supplied with a ring gear that is securely welded in place. SFI-certified under specification 29.1.