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Hays Heavy-Duty Flexplates

4.16 out of 5 stars 63 Customer Reviews

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. These heavy-duty flexplates are supplied with a ring gear that is securely welded in place. All Hays heavy-duty flexplates are zinc-dichromate plated to resist corrosion and SFI-certified under specification 29.1.

Results 1 - 3 of 3

Flexplate, Heavy-Duty, SFI 29.1, 0.105 in., Grade 80 Steel, Use with 7/16 in. Bolts, Mopar, Gen III Hemi to 727, 904, A500, A518, Each

Part Number: HAY-40-518

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Flexplates, Heavy-Duty, 130-tooth, Steel, SFI 29.1, Internal Engine Balance, 2-piece Rear Main Seal Style, Chrysler, Dodge, Plymouth, Each

Part Number: HAY-11-020

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Flexplates, Heavy-Duty, 131-tooth, Steel, SFI 29.1, Internal Engine Balance, Will Not Fit 545 or 65RFE Transmissions, Chrysler, Dodge, Jeep, Ram, Each

Part Number: HAY-11-021

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

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