There are two "magic numbers" for the Mopar faithful when it comes to Hemis: 392 and 426. Thanks to Callies Performance's new Compstar Hemi Speedpack kits for the 5.7L and 6.1L Hemi Magnum engines, you can boost displacement of your 21st century mill to those magical 20th century numbers, resulting in a 392ci displacement when used with the 5.7L block, or an incredible 426 ci in the 6.1L block.
Each kit includes a new steel crank, rods, plus custom Mahle pistons created specifically for this engine. All Hemi Speedpacks are internally balanced. Also included are high-strength ACL rod and main bearings that are tailor-made for the high-output Hemi engine.
Get It: Callies Performance Products
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