Holley Replacement Harmonic Balancer Bolts 97-321

Name: Holley Replacement Harmonic Balancer Bolts
Brand: Holley
SKU: HLY-97-321
Price: 20.89 USD
Availability: InStock
Rating: 3 (2 reviews)

3 out of 5 stars ( 2 )

Part Number: HLY-97-321

$20.89

Holley Replacement Harmonic Balancer Bolts

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
See More Specifications | Check the Fit

Holley Replacement Harmonic Balancer Bolts 97-321

HLY-97-321

3 out of 5 stars ( 2 )

Part Number: HLY-97-321

Estimated Ship Date: Monday 10/19/2026

$20.89

Back to Results

Overview

Applications

Q&A

Reviews

Estimated Ship Date: Monday 10/19/2026 Would you rather pick it up?

Overview

Brand:

Holley

Manufacturer's Part Number:

97-321

Part Type:

Harmonic Balancer Bolts

Product Line:

Holley Replacement Harmonic Balancer Bolts

Summit Racing Part Number:

HLY-97-321

UPC:

090127068991

Thread Size:

1 1/2 in.-16

Underhead Length (in.):

2.500 in.

Head Style:

12-point

Washer Included:

Yes

Fastener Tensile Strength (psi):

180,000 psi

Fastener Material:

Steel

Fastener Color:

Black

Quantity:

Sold individually.

Holley Replacement Harmonic Balancer Bolts

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