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Hays Steel SFI Certified Flexplate - Chrysler Small Block and Big Block

1964-1991 273-360 Small Block and 1958-1978 361-440 Big Block Chrysler with 10" or 11-1/8" Converter, 6-Bolt Crankshaft, Internal Balanced

PART# 11-020

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Hays heavy-duty flexplates for high performance and competition engines are constructed of a thicker than stock steel plate, enabling them to withstand the stress of high-stall torque converters and today's 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 Flexplate handles the force. These H.D. flexplates fit 904, 999, and 727 Torqueflite transmissions. All Hays heavy-duty flexplates are zinc-dichromate plated to resist corrosion and are SFI certified under specification 29.1.


  • Internally balanced flexplate is SFI 29.1 Certified
  • Designed to work with 3/8" or 7/16" torque converter bolts
  • Fits both 10" and 11-1/8" torque converter bolt patterns
  • Features Zinc Dichromate Plated finish for superior corrosion resistance and good looks
  • Heavy-Duty design utilized thicker than stock steel plate enabling to withstand the stress of high-stall converters and high-RPM engines
  • For 6-bolt crankshafts with 2-piece rear main seal


Center Bore (Register Diameter)2.160"
Emission Code5
Engine BalanceInternal
Product TypeFlexplate
SFI Certification29.1
Warranty90 Day
Part Number11-020



This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

Tech Resources

Designed to work with 3/8" or 7/16" torque converter bolts.

Warranty Information

90 Day: See Details
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