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Holley

Holley Replacement Harmonic Balancer Bolts 97-320 Bolts, Replacement, Steel, Black E-Coat, 7/16 in.-20 Thread, 2.8 in. Long, 12-Point Head, Washer included, Chevy, 4.6-6.6L, Each

SKU: HLY97-320

Harmonic Balancer Bolts
Holley Replacement Harmonic Balancer Bolts 97-320 Bolts, Replacement, Steel, Black E-Coat, 7/16 in.-20 Thread, 2.8 in. Long, 12-Point Head, Washer included, Chevy, 4.6-6.6L, Each

Holley

Holley Replacement Harmonic Balancer Bolts 97-320 Bolts, Replacement, Steel, Black E-Coat, 7/16 in.-20 Thread, 2.8 in. Long, 12-Point Head, Washer included, Chevy, 4.6-6.6L, Each

SKU: HLY97-320

Harmonic Balancer Bolts
A$40.95
BACKORDER This item will be special ordered in for you. Contact us prior to purchase if you require an ETA.
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Description

Holley harmonic balancer bolts offer the perfect fit to properly install your harmonic balancer on your engine with a Holley mid-mount accessory drive. The replacement hardware is available for Chevy big block or small block applications. Each one includes a balancer bolt and thick washer.

Features:

* 180,000 psi rating (Grade 9)
* Made from steel
* Black E-coat finish
* Big block--1/2 in. wrench size
* Small block--7/16 in. wrench size

Part Type

Harmonic Balancer Bolts

Data: v4.2 - Upd: 2026-10-16 04:07:37

Specifications

Product Attributes - Brand
Holley
Product Attributes - Manufacturer's Part Number
97-320
Product Attributes - Part Type
Harmonic Balancer Bolts
Product Attributes - Product Line
Holley Replacement Harmonic Balancer Bolts
Product Attributes - UPC
090127068984
Product Attributes - Thread Size
7/16 in.-20
Product Attributes - Underhead Length (in.)
2.800 in.
Product Attributes - Head Style
12-point
Product Attributes - Washer Included
Yes
Product Attributes - Fastener Tensile Strength (psi)
180,000 psi
Product Attributes - Fastener Material
Steel
Product Attributes - Fastener Color
Black
Product Attributes - Quantity
Sold individually.

Reference Information

Brand Name/s Holley
StreetFX SKU hly97-320
SFX Item ID 4782303
Supplier Item Code 4782303
Manufacturer SKU 97-320
Manufacturer UPC 90127068984
Alternative References HOL97-320, in.-20, 12-Point, 4.6-6.6L

Compatibility

Application Data
  • MakeCHEVROLET
    Beginning Year1957
    Ending Year1957
    Engine TypeV8
    Engine Size4.6L/283
    Engine FamilyChevy small block Gen I
  • MakeCHEVROLET
    Beginning Year1957
    Ending Year1967
    Engine TypeV8
    Engine Size4.6L/283
    Engine FamilyChevy small block Gen I
  • MakeCHEVROLET
    Beginning Year1958
    Ending Year1967
    Engine TypeV8
    Engine Size4.6L/283
    Engine FamilyChevy small block Gen I
  • MakeCHEVROLET
    Beginning Year1962
    Ending Year1968
    Engine TypeV8
    Engine Size5.3L/327
    Engine FamilyChevy small block Gen I
  • MakeCHEVROLET
    Beginning Year1962
    Ending Year1969
    Engine TypeV8
    Engine Size5.3L/327
    Engine FamilyChevy small block Gen I
  • MakeCHEVROLET
    Beginning Year1964
    Ending Year1967
    Engine TypeV8
    Engine Size5.4L/327
    Engine FamilyChevy small block Gen I
  • MakeCHEVROLET
    Beginning Year1967
    Ending Year1968
    Engine TypeV8
    Engine Size4.9L/302
    Engine FamilyChevy small block Gen I
  • MakeCHEVROLET
    Beginning Year1967
    Ending Year1969
    Engine TypeV8
    Engine Size4.9L/302
    Engine FamilyChevy small block Gen I
  • MakeCHEVROLET
    Beginning Year1967
    Ending Year1974
    Engine TypeV8
    Engine Size5.7L/350
    Engine FamilyChevy small block Gen I
  • MakeCHEVROLET
    Beginning Year1967
    Ending Year2002
    Engine TypeV8
    Engine Size5.7L/350
    Engine FamilyChevy small block Gen I
  • MakeCHEVROLET
    Beginning Year1968
    Ending Year1969
    Engine TypeV8
    Engine Size4.9L/302
    Engine FamilyChevy small block Gen I
  • MakeCHEVROLET
    Beginning Year1968
    Ending Year1969
    Engine TypeV8
    Engine Size5.3L/327
    Engine FamilyChevy small block Gen I
  • MakeCHEVROLET
    Beginning Year1968
    Ending Year1973
    Engine TypeV8
    Engine Size5.0L/307
    Engine FamilyChevy small block Gen I
  • MakeCHEVROLET
    Beginning Year1970
    Ending Year1974
    Engine TypeV8
    Engine Size6.6L/400
    Engine FamilyChevy small block Gen I
  • MakeCHEVROLET
    Beginning Year1970
    Ending Year1980
    Engine TypeV8
    Engine Size6.6L/400
    Engine FamilyChevy small block Gen I
  • MakeCHEVROLET
    Beginning Year1975
    Ending Year1980
    Engine TypeV8
    Engine Size6.6L/400
    Engine FamilyChevy small block Gen I
  • MakeCHEVROLET
    Beginning Year1975
    Ending Year1985
    Engine TypeV8
    Engine Size5.7L/350
    Engine FamilyChevy small block Gen I
  • MakeCHEVROLET
    Beginning Year1975
    Ending Year1986
    Engine TypeV8
    Engine Size5.7L/350
    Engine FamilyChevy small block Gen I
  • MakeCHEVROLET
    Beginning Year1976
    Ending Year1985
    Engine TypeV8
    Engine Size5.0L/305
    Engine FamilyChevy small block Gen I
  • MakeCHEVROLET
    Beginning Year1976
    Ending Year1986
    Engine TypeV8
    Engine Size5.0L/305
    Engine FamilyChevy small block Gen I
  • MakeCHEVROLET
    Beginning Year1976
    Ending Year2002
    Engine TypeV8
    Engine Size5.0L/305
    Engine FamilyChevy small block Gen I
  • MakeCHEVROLET
    Beginning Year1986
    Ending Year2002
    Engine TypeV8
    Engine Size5.0L/305
    Engine FamilyChevy small block Gen I
  • MakeCHEVROLET
    Beginning Year1986
    Ending Year2002
    Engine TypeV8
    Engine Size5.7L/350
    Engine FamilyChevy small block Gen I
  • MakeCHEVROLET
    Beginning Year1987
    Ending Year1995
    Engine TypeV8
    Engine Size5.0L/305
    Engine FamilyChevy small block Gen I
  • MakeCHEVROLET
    Beginning Year1987
    Ending Year1995
    Engine TypeV8
    Engine Size5.7L/350
    Engine FamilyChevy small block Gen I
  • MakeCHEVROLET
    Beginning Year1987
    Ending Year2002
    Engine TypeV8
    Engine Size5.0L/305
    Engine FamilyChevy small block Gen I
  • MakeCHEVROLET
    Beginning Year1987
    Ending Year2002
    Engine TypeV8
    Engine Size5.7L/350
    Engine FamilyChevy small block Gen I
  • MakeCHEVROLET
    Beginning Year1996
    Ending Year2002
    Engine TypeV8
    Engine Size5.0L/305
    Engine FamilyChevy small block Gen I
  • MakeCHEVROLET
    Beginning Year1996
    Ending Year2002
    Engine TypeV8
    Engine Size5.7L/350
    Engine FamilyChevy small block Gen I

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