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Manley Performance

Manley Subaru EJ20/EJ25 4340 Billet 79mm Stroke Turbo Tuff Series Crankshaft

$2,201.10 $2,143.05 Save $58.05

SKU: M004 190040B

In Stock
In Stock
Ships by Jun 15
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Non-Returnable Item

Description

Part #: 190040B

Manley Turbo Tuff (R) Billet Crankshafts deliver uncompromising strength, precision, and reliability for high-horsepower and high-boosted applications. Machined from premium 4340 Turbo Tuff (R) billet material, each crank features gun-drilled pins and fully knife-edged counterweights for reduced weight and superior balance. A multi-step heat treatment and nitriding process maximize durability, while stress relief, shot peening, and 100% magnaflux inspection ensure flawless quality.

Features:

    • Lightweight Design, 4340 Billet Material: Manufactured from 4340 ?Turbo-Tuff? Billet material, ensuring durability and performance. Crank pin and counterweights are gun drilled for lightening and the counterweights are fully knife edged to ensure precise balance and stability.
    • Enhanced Strength: A multi-step heat treatment process and nitriding enhance the crankshafts' strength and longevity.
    • Rigorous Quality Assurance: Each crankshaft undergoes stress relief, shot peening, and 100% magnafluxing to meet our stringent quality standards.
    • Improved ?Direct Shot? Oiling Passages: Optimized oil passages for direct oiling from the main oil gallery to each main bearing ensuring bearing and journal longevity.

Manley Crankshaft, CRANK-4340 79mm STROKE.

This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

Fitment

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Specifications

BrandManley Performance
Part NumberM004 190040B

Buy with Confidence

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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