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Hays Steel SFI Certified Flexplate - Mopar Gen III Hemi

2003-2020 Mopar 5.7L, 6.1L, 6.2L, and 6.4L Gen III Hemi to A727 (36RH/37RH), A904 (30RH), A500, A518 (46RH/46RE) Automatic Transmissions

PART# 40-518

$99.94   Suggested Retail
$80.96   Holleydays Price
Estimated shipping date: 01/25/2021
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This Hays SFI Certified flexplate gives you the perfect way to connect a Gen III Hemi to a 727, 904, A500, or A518 transmission without the use of a crankshaft spacer to get proper engine to transmission alignment. This allows you to use a stock-type torque converter with attached ring gear. Our flexplate is construction of 0.105" thick Grade 80 steel for maximum strength and designed to handle the stress of high stall torque converters and high horsepower engines. Features a zinc-dichromate plated finish to resist corrosion and SFI certified under specification 29.1


  • SFI 29.1 Certified – legal for use in racing classes that require SFI certification
  • Connects Gen III Hemi to 727, 904, A500, A518 transmission
  • Made from 0.105” Grade 80 steel to resist cracking near crankshaft flange
  • Zinc-dichromate plated to resist corrosion
  • CAD designed to provide optimum performance and reliability
  • For use with 7/16” torque converter bolts


Bolt Pattern727
Centerplate Thickness0.105"
Converter Bolt Size7/16
Emission Code5
EngineGen III Hemi
Engine BalanceInternal
Product TypeFlexplate
SFI Certification29.1
SFI CertifiedYes
StyleQuick Launch
Warranty90 Day
Part Number40-518



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.

Warranty Information

90 Day: See Details


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