Harmonic Balancer Bolt - Chevy Big Block

Name: Harmonic Balancer Bolt - Chevy Big Block
Brand: HOLLEY
SKU: 510-97-321
Price: 20.89 USD
Availability: InStock

^$20⁸⁹

Ships on 09/04/2026

Lowest Price Guarantee

Harmonic Balancer Bolt - Chevy Big Block

Chevy Big Block V8 Engines

Finish: Black E-Coat

PSI Rating: 180,000

Thread Diameter: 1/2

Thread Size: 1/2-20

Under Head Length: 2.500 in.

The Harmonic Balancer Bolt - Chevy Big Block from Holley is a harmonic balancer bolt engineered and manufactured to Holley's specifications for consistent fit and function.

Key Harmonic Balancer Bolt Features:

180,000 PSI Rating (Grade 9).
Made from Steel.
Black E-Coat Finish.
1/2 in. Wrench Size.
12-Point Bolt Head.
Large Diameter Extra Thick Washer - .200 in. Thick x 1.5 in. Diameter.

Part TypeHarmonic Balancer Bolt

BrandHOLLEY

Package Height2.5

Package Width9.8

Package Length13.15

Part CategoryReplacement Parts

Part FitmentUniversal

Vendor Part Number97-321

Package Qty1

Package TypeEA

No Questions

No Reviews

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

Harmonic Balancer Bolt - Chevy Big Block

Key Harmonic Balancer Bolt Features:

⚠️ Warning

Motor Vehicles

Tools

Electrical Cords