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.
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.
Features:
SFI-approved – 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
Aluminum flywheels feature forged heat treated steel ring gears and replaceable 1045 steel friction surface attached with high-grade fasteners
CAD designed to provide optimum performance and reliability
Available in Internal, External, or Zero (Neutral) balanced versions
Applications offered for a wide variety of engines
Specs
# of Teeth
153
Application
Big Block Chevy
Brand
Hays
Center Bore (Register Diameter)
2.486"
Emission Code
5
Engine Balance
External
Material
Steel
Product Type
Flywheels
SFI Certification
1.1
Warranty
Limited 90 Day Warranty
Part Number
10-139
Emissions
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.
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.