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The Moroso Ultimate Duty balancer bolt kit for Chevrolet big block engines includes heavy-duty bolts with 1/2in-20 thread for harmonic balancer attachment. Intended as a replacement or upgrade during engine service, the kit supplies the correct thread size and strength profile for big block crankshaft applications, simplifying reassembly by providing matched fasteners for secure balancer mounting.
Moroso Chevrolet Big Block Balancer Bolt Kit - Ultimate Duty - 1/2in-20 Thread
