What is the primary benefit of using 4340 alloy steel for this crankshaft?

4340 alloy steel is chosen for its excellent strength and durability. This material, combined with Manley's heat treatment and nitriding processes, helps the crankshaft withstand the high stresses and demands of performance LS engines.

How does the micro-polishing of the journals improve performance?

Micro-polishing the large radius journals reduces friction between the crankshaft and the engine bearings. Lower friction means less energy loss, which can contribute to improved engine efficiency and potentially better power delivery.

What does the 100% magnafluxing process ensure?

Magnafluxing is a non-destructive testing method used to detect surface and near-surface flaws, such as cracks. Performing this on every crankshaft ensures that there are no hidden defects before installation, contributing to the overall reliability of the component.

Specifications

Brand: Manley Performance
Part #: 194558
UPC: 807298108674

Manley Chevrolet LS Forged Crankshaft - 4.100in Stroke

Name: Manley Chevrolet LS Forged Crankshaft - 4.100in Stroke
Brand: Manley Performance
SKU: manley-performance-manley-chevrolet-ls-forged-crankshaft-4-100in-stroke-t14-881335
Price: 1559.64 USD
Availability: BackOrder

$1559.64

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Manley Chevrolet LS Forged Crankshaft - 4.100in Stroke. Built from 4340 alloy steel for improved strength and durability in high-performance LS engines.

Key Features

This crankshaft fits Chevrolet LS engines and features a 4.100-inch stroke.
Constructed from durable 4340 non-twist forged alloy steel for enhanced strength.
Undergoes a multi-step heat treatment and nitriding process to improve longevity.
Features gun-drilled mains and lightened rod journals to reduce overall weight.
Fully profiled counterweights are precisely balanced for stability.
Large radius journals are micro-polished to minimize friction.

This crankshaft is designed for Chevrolet LS engines. Please consult with a professional or refer to manufacturer specifications to confirm compatibility with your specific engine build.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

Starting with a 4.100-inch stroke, this Manley Pro Series crankshaft is forged from 4340 alloy steel, a material chosen for its excellent balance of strength and durability under demanding conditions. This isn't just a replacement part; it's a foundational piece for building a serious performance engine, specifically designed for Chevrolet LS applications. The choice of 4340 steel, combined with Manley's multi-step heat treatment and nitriding process, significantly enhances the crankshaft's resistance to stress and wear, aiming for long-term reliability even when pushed hard.

Manley has incorporated several design choices to optimize performance. The mains are gun-drilled and the rod journals are lightened, contributing to a reduction in overall weight. This lighter rotating assembly can lead to improved engine response and efficiency. Furthermore, the counterweights are fully profiled to ensure precise balance, which is critical for smooth operation and stability at higher RPMs. The large radius journals are micro-polished, a step that reduces friction where the bearings interface with the crankshaft, further contributing to performance and longevity.

Every Manley Pro Series crankshaft undergoes a rigorous quality assurance process. This includes stress relief treatments, shot peening to improve fatigue strength, and 100% magnafluxing to detect any potential flaws. These steps ensure that each crankshaft meets Manley's high standards before it leaves the factory. If you're building a performance LS engine and need a solid, well-built crankshaft that can handle the power, this Manley unit is a strong contender.