5.0 out of 5 stars Worked on Chevy in-line 6
Rating: 5
July 18, 2025
Verified purchase
Good quality. Harmonic balancer was walking off. This fixed in Read more
big-autoparts / Engine Parts
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SBC Harmonic Balancer Bolt Small Block Damper Compatible With Chevy 280 305 350 383, $21.85, Availability unknown. Image 1 of 3.
The details
SB-Chevy, 7/16''-20 x 2-1/4'' SBC Balancer Bolt Harmonic Chevy 280 305 350 383 Small Block Damper Grade 8 Material Heat-Treated For Strength Hex Prevents Socket Slippage Accurate and Uniform Torque Black Plated Finish Harmonic Balancer Bolt High hex head prevents socket slippage when adjusting valves or rotating the engine to degree in a cam.; Extra thick parallel ground washer delivers a smoother more accurate more uniform torque.; Block Damper Designed specifically for small block Chevy.; Balancer Bolt Ideal for high performance drag race and circle track applications.; Balancer Bolt Harmonic Comes complete with split lock washers to prevent any loosening caused by vibration. Rated 4.6 out of 5. Customers find the harmonic balancer bolt to be of excellent quality and say it fits perfectly.
From the manufacturer
SB-Chevy, 7/16''-20 x 2-1/4'' SBC Balancer Bolt Harmonic Chevy 280 305 350 383 Small Block Damper Grade 8 Material Heat-Treated For Strength Hex Prevents Socket Slippage Accurate and Uniform Torque Black Plated Finish
Highlights: Harmonic Balancer Bolt High hex head prevents socket slippage when adjusting valves or rotating the engine to degree in a cam. Extra thick parallel ground washer delivers a smoother more accurate more uniform torque. Block Damper Designed specifically for small block Chevy. Balancer Bolt Ideal for high performance drag race and circle track applications. Balancer Bolt Harmonic Comes complete with split lock washers to prevent any loosening caused by vibration.
Key details: Brand: big-autoparts | Model: SBC Harmonic Balancer Bolt Small Block Damper | Item Weight: 5.3 ounces | Package Dimensions: 4.09 x 2.09 x 1.22 inches | Is Discontinued By Manufacturer: No | Manufacturer Part Number: BA-10802004 | Customer Reviews: 4.6 4.6 out of 5 stars (425) 4.6 out of 5 stars
How it fits your day: Use the key specs and highlights above to match it to your setup, space, or routine before you check out.
Customer feedback: 4.6/5 average rating.
Customers say: Customers find the harmonic balancer bolt to be of excellent quality and say it fits perfectly.
Review snippets: Good quality. Harmonic balancer was walking off. This fixed in Read more / Exact fit Read more
Customers find the harmonic balancer bolt to be of excellent quality and say it fits perfectly.
Rating: 5
July 18, 2025
Verified purchase
Good quality. Harmonic balancer was walking off. This fixed in Read more
Rating: 5
February 27, 2026
Verified purchase
Exact fit Read more
Rating: 5
January 11, 2026
Verified purchase
Good deal! Quick delivery as well. Read more
Rating: 5
May 9, 2025
Verified purchase
worked fine, fit job perfectly Read more
Rating: 4
November 2, 2023
Verified purchase
seems ok Read more
Rating: 5
August 21, 2025
Verified purchase
very well made Read more
Rating: 5
April 20, 2024
Verified purchase
This bolt and washer was a perfect fit for my sbc 350, I hand taped the crankshaft threaded hole, used air pressure to blow it out then added Loctite blue to the threads and tightened up the bolt. Worked great, great value for the money. Read more
Rating: 5
July 14, 2025
Verified purchase
As described Read more
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