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Engines and Components› Harmonic Balancers

Darkhorse Motor Company

Man O' War Flywheel

Name: Man O' War Flywheel
Brand: Darkhorse Motor Company
SKU: DH-M17PRE-A99

$1,818.75

SKU: DH-M17PRE-A99

Free Shipping over $200

$100 Minimum Order

Non-Returnable Item

DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Darkhorse Man O' War Flywheel is a crankshaft assembly designed for 1999-2006 Alpha TwinCam Harley-Davidson models. It is custom-built to order.

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This assembly features a Chromoly Competition Connecting Rod, crankpin, and bearing kit, balanced to your specific engine build. It is engineered with focused balance factors derived from extensive engine dynamics knowledge, allowing for compatibility with a wide range of components. Constructed from hot-forged 4140 steel, this crankshaft is heat-treated and precision-machined to Darkhorse's exclusive specifications, utilizing integral forged shafts. When combined with their Pro-plug system and welding, it is presented as the strongest flywheel system available. The crankshaft is certified by Darkhorse Motor Co. to run gear drive camshafts and is prepared for Timken® left side main bearings; an optional sprocket shaft bearing race allows it to fit OEM style main bearings. This crankshaft assembly is built to order, with lead times typically ranging from 2 to 6 weeks after order placement and completion of the build form. Please note that any H-D® piston kit will require clearance for the full complement small end of the Competition Connecting Rods. All orders require an adult signature upon delivery. This product does not fit 2006 Dyna Models.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

Brand	Darkhorse Motor Company
Part Number	DH-M17PRE-A99
Category	Engines and Components

Videos

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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