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Engines and Components› Crankshafts and Components
Manley Performance
Manley Ford 351 Windsor Forged Crankshaft - 4.100in Stroke
SKU: M004 190340
Advanced — 4+ hours
Overview
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Part #: 190340
Our "Pro Series" 4340 alloy steel crankshafts are available with many value packed and high-performance enhancing features for a wide range of domestic engine applications.
Features:
- Lightweight Design, 4340 Material: Manufactured from forged 4340 material and featuring lightened rod journals for optimized engine performance. Counterweights are fully profiled to ensure precise balance and stability.
- Enhanced Strength: A multi-step heat treatment process and nitriding enhance the crankshafts' strength and longevity.
- Micro-Polished Journals: Large radius journals are micro-polished to reduce friction and enhance performance.
- Rigorous Quality Assurance: Each crankshaft undergoes stress relief, shot peening, and 100% magnafluxing to meet our stringent quality standards.
- Increase Displacement with a ?Stroker? Crankshaft: These cranks feature either the stock 3.543? stroke or an increased stroke of 3.750?, turning your 4.6L into a 5.0L or larger depending on your bore.
Manley Crankshaft, CRANK-4340 FORGE 4.100 STROKE.
This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
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 | Manley Performance |
| Part Number | M004 190340 |
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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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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.
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