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Spectre's harmonic balancer bolt kit is built for Chevrolet small block 265–400 V8 engines and includes a single grade‑8 2‑1/2" bolt with a plated finish plus a security lock washer. Intended as a direct replacement hardware solution for small block Chevy balancer installation, the kit adds a secure fastening option where a durable, long‑length grade‑8 bolt is required.
Spectre SB Chevy Harmonic Balancer Bolt
