Description

Block 426 4.25 Unfinished Bore

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 4.245″, 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.

OLD PART NUMBERS P5155072AD P5160149AC

manufactured by Callies/Energy

When purchasing a new HEMI block regardless if it’s a rough or finished bore, You Must have your engine builder/machine shop hones the cylinder walls to the recommended cross-hatch finish for the piston ring combination you’re running. Each Builder and Piston Manufacture will be different. To achieve proper piston to cylinder wall clearance the final machine hone must be done to achieve your desired 4.24+ As with the lifter bore also.
No photo description available.

 

 

PLEASE CALL FOR AVAILABILITY, WE DO HAVE STOCK BUT CANNOT GO THOUGH THE WEBSITE FOR PAYMENT.

 

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