 426 Hemi® Cast Iron Siamesed-Bore Block (4.490 Rough 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 4.25", 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.
IN STOCK READY TO SHIP TODAY! Regular price: $2,899.00 Sale price: $2,570.00 |  (Rough Bored at 4.19")
Maintains 4.25" bore size and water flow between the cylinders for improved cooling and sealing durability. If you want to drop in a Hemi where a Big Block used to be, select the block with cast/drilled ears to accommodate the Big Block engine mounts
NOTE: These blocks are being discontinued act fast while supplies last.
IN STOCK READY TO SHIP TODAY! Regular price: $2,999.00 Sale price: $2,895.00 |
Due to limited availability on Mopar engine blocks, you must call us @ 800-843-2821 to get on order list or check stock.
Maintains 4.25" bore size and water flow between the cylinders for improved cooling and sealing durability. If you want to drop in a Hemi where a Big Block used to be, select the block with cast/drilled ears to accommodate the Big Block engine mounts. $2,749.00 | Due to limited availability on Mopar engine blocks, you must call us @ 800-843-2821 to get on order list or check stock.
Maintains 4.25" bore size and water flow between the cylinders for improved cooling and sealing durability. If you want to drop in a Hemi where a Big Block used to be, select the block with cast/drilled ears to accommodate the Big Block engine mounts. $2,707.00 |
 (Rough Bored at 4.19")
Siamesed-Bore 426 Hemi® Blocks give engine builders flexibility. Blocks can be bored to the stock size of 4.25", but are specifically designed to be bored larger. Remember to sonic check each block if you approach or exceed the 4.50" bore diameters.
IN STOCK READY TO SHIP TODAY! Regular price: $2,999.00 Sale price: $2,895.00 | Due to limited availability on Mopar engine blocks, you must call us @ 800-843-2821 to get on order list or check stock.
Siamesed-Bore 426 Hemi® Blocks give engine builders flexibility. Blocks can be bored to the stock size of 4.25", but are specifically designed to be bored larger. Remember to sonic check each block if you approach or exceed the 4.50" bore diameters. $2,787.00 |
Due to limited availability on Mopar engine blocks, you must call us @ 800-843-2821 to get on order list or check stock.
Siamesed-Bore 426 Hemi® Blocks give engine builders
flexibility. Blocks can be bored to the stock size of 4.25", but are specifically designed to be bored larger. Remember to sonic check each block if you approach or exceed the 4.50" bore diameters. $2,787.00 |