# Proform 66508 | 66508 Harmonic Balancer; BB Chevy 396

### PROFORM 66508 APPLICATION SPECS:

### Attributes

-   Applications: Chevy Big Block 396 Engines 1965 to 1990
-   Category: Harmonic Balancer
-   Color: Natural Finish
-   Diameter: 8-in.
-   Finish: Natural
-   Internally/Externally Balanced: Internal
-   Material: Nodular Iron
-   RPM Limit: 6000 RPM

### Product Description

Made From Nodular Iron and Features a Natural Finish,Non-SFI Approved,100% New OEM Replacement Unit,Engine Harmonic Balancer,Fits Big Block Chevy 396 Internally Balanced Engines,Includes Degree Markings

### FAQ

**What part number is this?** The listed part number is 66508.

**Is this product designed for direct replacement?** Confirm the original part specifications and intended application before ordering.

**Should I confirm compatibility before ordering?** Yes. Compare the original part and specifications before ordering.

### Common Searches

-   Proform 66508
-   66508 specifications
-   Proform Harmonic Balancer; BB Chevy 396

## Details

- **Price:** 295.77 CAD
- **Vendor:** Proform
- **Type:** Harmonic Balancer
- **Tags:** 66508, Harmonic Balancer, Proform

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 295.77 CAD | In stock |

## Images

- Proform 66508 | 66508 Harmonic Balancer; BB Chevy 396

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/66508-vp-proform-518)
> Updated: 2026-10-20