Hays 12-040 Steel SFI Certified Flexplate - Small Block Ford

1981-1996 Ford 255-351W Small Block, 157 tooth, 50oz. External balanced

PART# 12-040

Be the first to write a review
$112.00   Suggested Retail
$99.95   Your Price
Free Shipping on orders over $100*
In Stock  
Add to Wish List


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 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 are supplied with a ring gear that is securely welded in place and feature dual bolt patterns for use with either a Powerglide or Turbo-Hydromatic torque converter. All Hays heavy-duty flexplates are zinc-dichromate plated to resist corrosion and are SFI certified under specification 29.1.


  • Constructed of thicker than stock steel plate to withstand the stress of high stall speed converters and high RPM enginge
  • Securely welded ring gear and zinc dichromate plated to resist rust and corrosion.
  • Meets SFI specification 29.1 for racing
  • Designed specifically to work with externally balanced Small Block Ford V8 engines

Product Attributes

Emission Code5
Manufacturer Part Number12-040
Product TypeFlexplates
Part Number12-040



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.


Product Reviews

    *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages.

    Some parts are not legal for use in California or other states with similar regulations.