BB Chevy square drive balancer bolt kit. Genuine ARP hardware, supplied as kit 135-2503.Fits Chevrolet — 396, 402, 409, 427, 454, 496, 502, 572, Big Block (all)Details Kit number: 135-2503 Category: Engine Components Product group: Harmonic Balancers California Proposition 65 warning⚠ WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
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