Hays 40-511 - Performance Flexplate

Hays - 40-511

Hays Steel SFI Certified Flexplate - Big Block Chevrolet

1970-1990 454 Big Block Chevrolet, 168 Tooth, External Balanced

Hays SFI Approved heavy-duty flexplates for BBC 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 4mm thick center plate utilized on a Hays flexplate handles the brute force. These flexplates are supplied with a precision double welded ring gear and feature multiple engine and transmission bolt patterns. All Hays flexplates are zinc-dichromate plated to resist corrosion and are SFI certified under specification 29.1.

• SFI-approved – legal for use in racing classes that require SFI certification
• Flexplate features a precision double welded ring gear
• Has 4mm thick center plate to resist cracking near crankshaft flange
• Zinc-dichromate plated to resist corrosion
• CAD designed to provide optimum performance and reliability
• Available in Internal or External balanced versions
• Applications offered for a wide variety of engine and transmission bolt patterns