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Hays Billet Steel SFI Certified Flywheel - Pontiac

1964-1981 Pontiac 326-455, 166-Tooth, 30 lb, Internal Balance

PART# 13-130

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$389.00   Suggested Retail
$314.96   Holleydays Price
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These SFI-Rated flywheels are engineered to handle extreme duty applications and designed to take the punishment of todays high horsepower engines. Our billet steel flywheels are CAD engineered and precision CNC machined to strict tolerances. For internally balanced engines. Includes a removable black insert that allows this to fit the 2.5" crank and remove to fit the 2.75".


  • Billet steel construction
  • SFI certified
  • 30 lb flywheel with 166 tooth count
  • Fits 10.5" or 11" clutches
  • 2.50" register bore. Includes an installed center ring that can be removed for 2.75"


# of Teeth166
Center Bore (Register Diameter)2.50" and 2.75" after removing insert
Emission Code5
Engine BalanceInternal
Product TypeFlywheels
SFI Certification1.1
WarrantyLimited 90 Day Warranty
Part Number13-130



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

Pontiac changed the crankshaft register partway through 1976 on the 350 and 400 engines. The only way to be sure of which flywheel you need is to measure the register (or snout) at the end of the crankshaft where the flywheel mounts. All 455 engines use the larger register. Includes a removable black insert that allows this to fit the 2.5" crank and remove to fit the 2.75".

Warranty Information

Limited 90 Day Warranty: See Details


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