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Hays 20-237 Billet Aluminum Flywheel, 1970-90 BBC 454
Hays 20-237 Billet Aluminum Flywheel, 1970-90 BBC 454

Hays 20-237 Billet Aluminum Flywheel, 1970-90 BBC 454

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Hays 20-237 Billet Aluminum Flywheel, 1970-90 BBC 454
Hays 20-237 Billet Aluminum Flywheel, 1970-90 BBC 454
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We estimate this item will ship on or before March 26th.
Part # 42520237
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  • This item ships directly from the manufacturer. It may take an additional 2 business days for Hays to ship this item.
  • Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.
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MFG. Part #:
Tooth Count:
14 lbs.
Sold in Quantity:
GTIN Code:
Engine Balance:
SFI Rating:
Rear Main Seal Style:
Flywheel Material:
Billet aluminum
Replaceable Friction Surface:


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.

Hays billet aluminum SFI approved flywheel, 6061 T-6, CHEV, BB 454 1970-90, External Balance, 153T, 1045 SFP, with early design bolt-on counter weight

  • 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
Some parts are not legal for use in California or other states with similar laws/regulations

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