The crankshaft turns the pistons' up-and-down motion into rotation, and in a high-horsepower engine it has to survive enormous loads. The American makers on this page machine billet crankshafts from solid steel bar, finish forged crankshafts in-house, and forge OEM crankshafts on large press lines, for Chevy, Ford, Mopar, diesel and import engines.
Several also make connecting rods and sell matched rotating assemblies. Engine blocks and pistons have their own pages.
More types in this section ↓
Aichi Forge USA makes forged crankshafts, in-line and twisted V-style, from 16.5 kg up to 364 kg, plus forged steel connecting rods and camshafts. They are sold to makers of cars and light trucks, medium and heavy trucks, general aviation, mining, oil field and heavy-duty equipment. Aichi Forge USA is part of Japan's Aichi Steel, a Toyota group company.
Made in: Georgetown, KY. Crankshafts are forged there on press lines of 3,000 to 8,000 metric tons, then drilled, balanced, milled, heat-treated, coated and inspected. Most forging dies are designed and built in-house.
Source: Aichi Forge Powertrain Components, checked 10/2026
Georgetown, KYBryant Racing makes custom and catalog crankshafts for Chevrolet, Ford and Mopar engines, used mainly in drag racing, NASCAR and high-performance builds. Crankshafts are its only product.
Made in: Anaheim, CA (all crankshafts produced in-house), starting from US-made Timken steel. It has made crankshafts since 1983.
Source: Bryant Racing about, checked 10/2026
Anaheim, CACallies makes forged and billet crankshafts for racing and high-performance engines, including Magnum forged cranks for small- and big-block Chevy, LS/LT, Ford and Mopar engines, Ultra Billet, Ultra Boost and Ultra Dirt cranks, and the lower-cost Compstar line.
Made in: Fostoria, OH (Callies-brand crankshafts). Compstar cranks are forged and partly machined overseas, then finished and inspected in Fostoria.
Source: Engine Builder, checked 10/2026
Fostoria, OH
Crower makes billet and forged crankshafts for racing and performance engines, including small-block Chevy Ultra-Light, Maxi-Light and Light-Weight cranks, 426 Hemi cranks and custom billet cranks built to order.
Made in: San Diego, CA (crankshafts machined in-house; the company says it uses US-milled steel).
Source: Crower American-made crankshafts, checked 10/2026
San Diego, CA
SCAT makes crankshafts, connecting rods and complete rotating assemblies for domestic and import engines, from street cast and forged cranks to billet racing cranks, sold as single parts or balanced kits.
Made in: Redondo Beach, CA (billet crankshafts made in-house from start to finish; forged crankshafts machined in-house from forgings).
Source: LSX Mag at SCAT, checked 10/2026
Redondo Beach, CA
Winberg Crankshafts makes billet racing crankshafts for Chevrolet, Ford, Mopar Hemi and Cummins, Duramax and Power Stroke diesel engines, mostly as custom orders for drag racing and other professional classes, with an optional micro-polish finish.
Made in: Denver, CO (machining, robotic heat treating, nitriding, grinding and WINfinish polishing at its own shop on West 48th Avenue).
Source: EngineLabs on Winberg, Race Engine Technology, checked 10/2026
Denver, CO
Forged or billet?
A forged crank is pressed close to shape and then machined, which keeps the grain of the steel running along the crank. A billet crank is machined from a solid bar, which lets the maker choose any stroke, counterweight design or journal size and suits custom racing engines. Both are stronger than a cast factory crank.
Crankshaft makers by state
- California: Bryant Racing (Anaheim), Crower (San Diego), SCAT Crankshafts (Redondo Beach)
- Colorado: Winberg Crankshafts (Denver)
- Kentucky: Aichi Forge USA (Georgetown)
- Ohio: Callies (Fostoria)
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