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 high-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.