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.
Specifications:
| Description_DES |
Hays Steel SFI Certified Flexplate - Big Block Chevrolet |
| Description_MKT |
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. |
| Description_INV |
OBS FLEXPLT 70-90 BBC EXT 168T |
| Description_EXT |
1970-1990 454 Big Block Chevrolet, 168 Tooth, External Balanced |
| Description_FAB |
SFI-approved - legal for use in racing classes that require SFI certification |
| Description_FAB |
Flexplate features a precision double welded ring gear |
| Description_FAB |
Has 4mm thick center plate to resist cracking near crankshaft flange |
| Description_FAB |
Zinc-dichromate plated to resist corrosion |
| Description_FAB |
CAD designed to provide optimum performance and reliability |
| Description_FAB |
Available in Internal or External balanced versions |
| Description_FAB |
Applications offered for a wide variety of engine and transmission bolt patterns |
| # of Teeth |
168 |
| Converter Bolt Pattern |
3 x 9.75", 3 x 10.75", 3 x 11.50" |
| Emission Code |
5 |
| Engine |
Chevrolet Big Block Mark IV |
| Engine Size |
454 Cubic Inch / 7.4L |
| SFI Certification |
29.1 |
| Thickness |
4 mm |
| Crankshaft Bolt Hole Count |
6 |
| Engine Balance |
External |
| Finish |
Silver |
| Rear Main Seal Style |
Two Piece |
| Style |
Quick Launch |
| Warning |
California Proposition 65 |
| Application |
Chevrolet |
| Brand |
Hays |
| Centerplate Thickness |
4 mm |
| Product Type |
Flexplates |
| SFI Approved |
Yes |
| Special Offers |
Summer Sale |
| Warranty |
90 Day |
| Length |
0.9000 |
| Width |
14.0000 |
| Height |
14.3000 |
| Weight |
8.1000 |
