Heavy-Duty Flexplate

Name: Heavy-Duty Flexplate
Brand: HAYS
SKU: 490-10-012
Price: 176.95 USD
Availability: InStock

^$176⁹⁵

Ships on 11/02/2026

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^$89⁹⁶

555-601070

Heavy-Duty SFI Flexplate for 1957-1985 Small Block Chevy, Big Block Chevy, and 90 degree V6, 153-Tooth [Internally Balanced]

^$86⁹⁹

Chevy

Internal Balance

Heavy-Duty Flexplate

1955-1985 Small Block Chevy

Internal Balance

153-Tooth

SFI 29.1 Approved

Zinc Dichromate Finish

HAYS / MR GASKET 10-012 Features:

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 are supplied with a ring gear that is securely welded in place and feature dual bolt patterns for flexibility in adapting to multiple transmission style torque converters. All Hays heavy-duty flexplates are zinc-dichromate plated to resist corrosion and are SFI certified under specification 29.1.

S.F.I. 29.1 Certified
153 Tooth Ring Gear
Internal Balance Chevy V6 Engines
Zinc Dichromate Plated
Heavy Duty
0.030" thicker than the stock flexplate

SFI-Certified Flexplates for Racing

Hay's heavy-duty Flexplates are constructed from thicker-than-stock grade 80 steel and engineered to withstand the force of high-stall torque converters and high-RPM performance and competition engines. This zinc-dichromate plated 29.1 or 29.3 SFI-certified flexplates are supplied with a ring gear that is securely welded in place and feature dual bolt patterns for flexibility in adapting to multiple transmission-style torque converters.

Part TypeFlexplate

Product LineHays Steel SFI Certified Flexplates

BrandHAYS

Package Height0.7

Package Width12.7

Package Length13.1

Weight5.84 PG

Part CategoryPerformance Parts

Part FitmentSemi Universal

Vendor Part Number10-012

Package Qty1

Package TypeEA