• Stock-Type Replacement – Direct fit 6.75-inch harmonic balancer designed for Chevrolet small block 262-350 V8 engines from 1955-1995 (excluding LT and LS)., • Internal Balance Design – Neutral-balanced configuration suitable for internal balance applications such as 350 engines and similar setups., • Durable Steel Construction – Built from strong steel with a black finish for long-lasting performance in street or restoration projects., • Correct OE Dimensions – Features 6.75-inch outside diameter and 1.20-inch inside diameter to match factory specifications., • Application Notes – Not SFI certified and not recommended for use above 6500 RPM; compatible with Chevrolet 348-409 W-block engines as well.
Small Block Chevy Harmonic Balancer, 6-3/4 Inch, Black Speedway Motors
Small Block Chevy Harmonic Balancer, 6-3/4 Inch, Black
Sku # 91015358
Mfr. Part # 91015358
Condition
New
Brand
Speedway Motors
Sold
Each
Details

Small block Chevy stock-type replacement 6-3/4" diameter harmonic balancer. For internal balance engines.

  • NOT recommended for RPMs in excess of 6500
  • NOT SFI certified
  • Internal balance

Item Details

Not SFI Certified
Specs
MFG. Part #
91015358
Outside Diameter
6.75"
Inside Diameter
1.20"
Overall Thickness
2.31"
Thickness
1.1875"
SFI Rating
Not SFI-approved
Weight
8.50 lbs.
Material Type
Steel
Finish
Painted
Sold in Quantity
Each
Notes
Not recommended for RPM's in excess of 6500.
SFI Rated
No
Engine Balance
Internal
Degree Markings
Yes
Reviews

Perfect balancer for SBC!!

Rated
Product Rating
by Old truck guy from MT on March 23, 2026

Summary: I installed it with correct tool, perfect fit, love the timing marks, large and very readable. Absolutely love the extra mark on balancer for TDC when mark is at absolute vertical when rotating crank. Extremely well thought out!!

Yes, I recommend this product.

I would buy again.

Rated
Product Rating
by Good Rob on July 20, 2025

Summary: Well made.

Yes, I recommend this product.

I would by this again

Rated
Product Rating
by Smoothop on May 18, 2025

Summary: Looks like good quality. Good fitment. Seems to work well.

Yes, I recommend this product.

I would refer this product to a friend.

Rated
Product Rating
by Spanky on September 20, 2024

Summary: This product looks great and works great so far. I have only had it on my car for a week and the timing was good and pulley bolted up well and bolted up nicely to the crank shaft.

Yes, I recommend this product.

yes

Rated
Product Rating
by Soloco on September 03, 2021

Summary: Very nice item

Yes, I recommend this product.

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Tech Support
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About
Speedway Motors is America’s Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 74 years. Founded in 1952 by “Speedy” Bill Smith – a racer and street rodder himself – Speedway has grown from a one-man operation to become the world’s largest manufacturer, distributor and retailer of street rod and racing products. Our industry-leading fast delivery is the result of same-day shipping from our state-of-the-art, centrally located 500,000 sq. ft. headquarters. Speedway’s size offers customers unmatched product selection and low pricing, while our excellent technical support and customer service have made us a recognized leader in the rodding and racing industries.