The 2025 PRI Show brought out some of the most exciting innovations in performance parts, and Callies came for diesel enthusiasts with the new 6.7L Cummins crankshaft. We caught up with Brook Piper at the Callies booth, and this crank is nothing short of a game-changer for Cummins enthusiasts and high-horsepower builders alike.
Starting with the basics, this crank is forged from premium 4340 material, ensuring strength from the ground up. Callies didn’t stop there—they redesigned the oiling system to a straight-shot race-style feed, addressing the common bearing issues found in newer common-rail engines. The result is a crank that not only handles serious power but also keeps rod bearings well-lubricated and long-lasting under extreme conditions.
The crank’s design includes larger radii for increased durability, and while this is the forged version debuting now, Callies plans to release a high-end billet version by mid-year. This will cater to pulling applications and other severe-duty builds, giving builders even more options. Brook confidently stated that this crank is capable of handling 2,000 horsepower without breaking a sweat, making it one of the most robust offerings for Cummins builds on the market.
What’s especially appealing is the versatility of this crank. Whether you’re a drag racer, a builder doing a high-power project, or someone looking for an OEM replacement, this piece fits the bill. With OEM replacements scarce—and sometimes forcing builders to buy an entire donor motor—Callies’ solution provides a reliable, high-performance crankshaft for roughly $2,300, significantly less than the cost of sourcing a donor engine.
In Brook’s words, this crank is essentially the “Swiss Army knife” of Cummins cranks—one piece that covers everything from basic rebuilds in a work truck to extreme horsepower applications. It’s a one-size-fits-all solution designed to last forever while making serious power.
For anyone building or upgrading a 6.7L Cummins, Callies’ new crankshaft should be under consideration, offering strength, reliability, and versatility—all wrapped up in a single, high-performance package.
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