Holley Harmonic Balancer Bolt - Chevy Big Block - 12-Point 97-321
SKU: 69036135052

Holley Harmonic Balancer Bolt - Chevy Big Block - 12-Point 97-321

Sale price$18.80 Regular price$20.89
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Ships within 48 hours · Estimated delivery Jul 8 - Jul 13

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Description

Holley Harmonic Balancer Bolt - Chevy Big Block - 12-Point 97-321Replacement Harmonic Balancer Bolt with Thick Washer, for Chevy Big Block 396 454 with Holley Mid Mount Accessory Drive System 20 242 & 20 242BK Replacement harmonic balancer bolt with thick washer for Big Block Chevy Mid Mount Accessory drive system. 12 Point, 1 2" Wrench Size, 1 2" 20 x 2. 500" Under Head Length, Washer diameter 1. 5" x 0. 200" Thick. NOTES: Torque Harmonic Balancer Bolt to 85 ft lbs. Features: 180,000 PSI Rating (Grade 9) Made from

Replacement Harmonic Balancer Bolt with Thick Washer, for Chevy Big Block 396-454 with Holley Mid-Mount Accessory Drive System 20-242 & 20-242BK

Replacement harmonic balancer bolt with thick washer for Big Block Chevy Mid-Mount Accessory drive system. 12-Point, 1/2" Wrench Size, 1/2"-20 x 2.500" Under Head Length, Washer diameter 1.5" x 0.200" Thick.

NOTES: Torque Harmonic Balancer Bolt to 85 ft/lbs.

Features:

  • 180,000 PSI Rating (Grade 9)
  • Made from Steel
  • Black E-Coat Finish
  • 1/2" Wrench Size
  • 12-Point Bolt Head
  • Large Diameter Extra Thick Washer - .200" Thick x 1.5" Diameter
  • Reusable - Not Torque-To-Yield

Specs:

Bolt Grade 10.9
Brand Holley
Color Black
Emission Code 6
Engine Chevy Big Block V8
Finish Black E-Coat
Grade Type Performance
Head Drive Type 12 Point
Head Style 12-Point
Length 2.5Inch
Material Steel
Product Type Harmonic Balancer Bolts
PSI Rating 180,000
Reusable Yes
Thread Diameter 1/2Inch
Thread Pitch 20
Thread Size 1/2-20
Under Head Length 2.500"
Universal Or Specific Fit Universal
Washer Included Yes
Washer Size .200" Thick x 1.5" Diameter
Wrench Size 1/2"
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 69036135052

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Dsmorgan
New York, US
★★★★★ 5
Fun ball
It doesn’t last a whole long time, but she loves it! It’s crazy and it drives her playfulness crazy!
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Reviewed in the United States on February 8, 2026
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Manmomma
Lowell, US
★★★★★ 2
No squeak balls
Color: A.Green+Orange
They don’t squeak. They bounce much either.
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Reviewed in the United States on March 25, 2026
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Odalis Perez
Massapequa, US
★★★★★ 3
Too big for puppies
Color: A.Green+Orange
The balls were a bit too big for my 6 month chihuahuas:/ they are as big as a tennis ball so puppies didn’t like nor play with them
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Reviewed in the United States on April 26, 2026
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Shawn
Boise, US
★★★★★ 5
Frenchie approved
Color: A.Orange+Blue+Green
Frenchie approved
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Reviewed in the United States on May 6, 2026
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Karen W.
Natrona Heights, US
★★★★★ 5
Soft and light
Color: A.Orange+Blue+Green
My doxie loves them
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Reviewed in the United States on April 26, 2026

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