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Hays Billet Aluminum SFI Certified Flywheel - Small and Big Block Chevrolet

Small Block and Big Block Chevrolet, 168 Tooth, External Balance

PART# 20-235

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$563.00   Suggested Retail
$505.95   Holleydays Price
Estimated shipping date: 03/08/2021
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Hays Aluminum Flywheels, the favorite choice of many road racers, are also popular with the serious drag racer running a light car and large cubic inch motor. Machined from 7075 T-6 forged billet aluminum, this high strength alloy surpasses all material specs as to strength and centrifugal distortion. All Hays Aluminum Flywheels feature a replaceable steel or bronze heat shield friction surface and are drilled to accept either the Borg & Beck or Long-Style clutch pattern. The ring gear is securely mounted with welded tabs that are riveted to the flywheel to prevent spinning. Hays flywheels are certified under S.F.I. spec 1.1. Part No. 20-235 is a "Detroit Balance" flywheel, externally balanced to stock (counterweighted) specs. Application: Chevy 1970-90 454 with large bellhousing. Pressure Plate Pattern: Borg & Beck/Diaphragm 10.5" & Borg & Beck/Diaphragm/Long 11", Ring Gear Teeth: 168, Weight: 15.


# of Teeth168
ApplicationChevrolet Big Block
Chevrolet Small Block
Center Bore (Register Diameter)2.486"
Emission Code5
EngineChevy Big Block V8
Chevy Small Block V8
Engine BalanceExternal
Product TypeFlywheels
WarrantyLimited 90 Day Warranty
Part Number20-235

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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

Limited 90 Day Warranty: See Details



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