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Holley Replacement Harmonic Balancer Bolts 97-321 Bolts, Replacement, Steel, Black E-Coat, 1/2 in.-20 Thread, 2.5 in. Long, 12-Point Head, Washer included, Chevy, 6.5-8.1L, Each

SKU: HLY97-321

Harmonic Balancer Bolts

Holley Replacement Harmonic Balancer Bolts 97-321 Bolts, Replacement, Steel, Black E-Coat, 1/2 in.-20 Thread, 2.5 in. Long, 12-Point Head, Washer included, Chevy, 6.5-8.1L, Each

SKU: HLY97-321

Harmonic Balancer Bolts
A$41.61
IN STOCK! Est Ship 3-7 Days days. In stock at 1 location (more than 10 available)

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Description


Data: v2 - Desc: v4.2 - Upd: 2026-11-08 02:17:43

Data: v4.2 - Upd: 2026-11-09 19:41:48

Features

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Specifications

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Holley, Hilborn, Holley Efi, Retrobright, Terminator X
StreetFX SKU hly97-321
SFX Item ID 4784732
Accounting SKU hly-97-321
Manufacturer SKU 97-321
Manufacturer UPC 090127068991
Alternative References 97-321, HLY-97-321, HOL97-321

Harmonic Balancer Bolts, Replacement, Steel, Black E-Coat, 1/2 in.-20 Thread, 2.5 in. Long, 12-Point Head, Washer included, Chevy, 6.5-8.1L, Each

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

Product Attributes
BrandHolley
Manufacturer's Part Number97-321
Part TypeHarmonic Balancer Bolts
Product LineHolley Replacement Harmonic Balancer Bolts
UPC090127068991
Thread Size1 1/2 in.-16
Underhead Length (in.)2.500 in.
Head Style12-point
Washer IncludedYes
Fastener Tensile Strength (psi)180,000 psi
Fastener MaterialSteel
Fastener ColorBlack
QuantitySold individually.

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