Callies Dragonslayer and Magnum forged cranks are phenomenal pieces but any forged crank has its limits. The Ultra Billet cranks push those limits higher and bring all the best design features such as their Aero-Shed and Ultra-Shed finishes. Thinking 1,500 - 2,000 hp? You should be thinking Callies Ultra Billet.
We like a 4" stroke with 6" rods as it enables us to design what we believe is an ideal piston to top off the rotating assembly. With a 4.125" bore in a Dart LS Next block, the resultant displacement is 427 cubic inches.
Callies is our preferred vendor for high-end cranks for a lot of reasons. These billet cranks are produced in the USA from extremely clean Timken 4330VM alloy steel. The machining and heat treating are also all done in the USA. The video that we shot at their Fostoria Ohio plant shows the level of care taken by Callies to ensure that every part they ship meets the highest quality standards. The final arbiter is performance and Callies is race-proven.
These cranks are available in both standard and long snout configuration.
You can purchase these Ultra Billets from us as cranks only, complete crate engines and anything in between.