10-430HYS - Hays 10-430HYS Billet Steel SFI Certified Flywheel Image

Hays 10-430HYS Billet Steel SFI Certified Flywheel

Compatible with 1970-1990 454 Big Block Chevy, 31 LB, 33 oz External Balance, 168-tooth

PART# 10-430HYS

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Upgrade your stock flywheel to a Hays SFI-approved billet steel or aluminum flywheel. Each flywheel is precision machined and engineered to handle extreme duty applications along with being designed to take the punishment of today's high horsepower street, off-road, and race engines.


  • SFI-approved â€" legal for use in racing classes that require SFI certification
  • Choose precision CNC-machined 1045 billet steel for maximum strength and durability or 6061-T6 billet aluminum construction for weight reduction and excellent heat dissipation
  • CAD designed to provide optimum performance and reliability

Product Attributes

Brand Hays
Emission Code5
Manufacturer Part Number10-430HYS
Product TypeFlywheels
Part Number10-430HYS



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.

Tech Resources

When choosing a flywheel take note that a heavy flywheel stores more energy as it spins than a light flywheel. If you have a heavy car combination that requires more power (or inertia) to make it launch without bogging the engine, you will want a heavier flywheel. Remember that a heavier flywheel will be slower to accelerate through the gears where a lighter flywheel creates less inertia at launch but will accelerate faster through the gears.


Product Reviews

    *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages.

    Some parts are not legal for use in California or other states with similar regulations.