Darkhorse Motor Company, long regarded as producing the strongest foundations for all Harley-Davidson® performance engines, released the Man O-War crankshaft to allow you to put even more HP to the road!

The Man O-War Signature crankshaft assembly is a true “custom built” crankshaft with our Chromoly Competition Connecting Rod, crankpin & bearing kit balanced to your specific engine build.  We utilize focused & engineered balance factors from our vast library of engine dynamics allowing you to install a wide variety of components with this crankshaft.

Stronger than OEM, our crankshafts are made of “hot-forged” 4140 and then heat treated and precision machined according to our exclusive specs while utilizing integral forged shafts.  When coupled with our Pro-plug system & welded, it is absolutely the strongest flywheel system on the market today!

*Options including the Darkhorse “Pro-Edge & Drill Window” to lighten the flywheels can be added to orders - please contact sales@darkhorsemoco.com or call 920.726.9999 to discuss options.

This crankshaft is Darkhorse Motor Co. certified to run gear drive camshafts.

*The crankshaft comes prepared for use in Timken® left side main bearings, with the addition of optional sprocket shaft bearing race will fit into OEM style main bearings.