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

Holley
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Specifications:

Description:

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.