| | Cast Iron Siamese-Bore 426 Hemi Blocks give engine builders
the flexibility for a larger bore. Blocks can be bored to the stock
size of 4.25", but are specifically designed to be bored larger.
Mopar recommends that you sonic check each block if you plan
to exceed as-shipped bore diameters.
Raised cam, rough bored at 4.498". | 
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